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In fig Op is equal to diameter of the circle. Prove that abp is a equilateral triangle..
sry abt the figure but i dnt know how to upload the figure
But its a circle with two tangents AP and BP... and joining OP, OA and OB ( o is the centre of the circle... )
1. To give suggestive demonstration of formula that the area of the circle is half the product of its circumfrence and radius
a)by coiling method
b)by paper cutting and pasting.
2.to verify that the sum of first n odd natural number is n2 by an activity method.
3.To verify that the sum of area of three sectors of same radii 'r' formed at the vertices (as centre) of any triangle r2/2using paper cutting and pasting.
4.
a)to compare the curves surface area of two right circular cylinder which are formed rectangular sheet of paper having same dimension.
b)to compare total surface area of two right circular cylinder s which are formed from rectangular sheet of paper having same dimension.
5.to compare the volume of two right circular cylinder which are formed rectangular sheet of paper having same dimension.
6.to illustrate the medians of a triangle concur at a point called thecentroid,which always lies inside the circle using paper folding mehod.
plz send SOLUTION FAST AS MUCH POSSIBLE ON
siddhantbhopal@gmail.com
OPQR is a rhombus, three of whose vertices lie on a circle with centre O. If the area of the rhombus is 32 (under-root)3 cm2, find the radius of the circle.
The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour?
please write in a simple method?
AB is one of the direct common tangent of two circles ofradii 12cm and 4cmrespectively touching each other.find the area enclosed by the circles and the tangent.
PQRS is a diameter of a circle of radius 6cm. The lengths PQ, QR and RS are equal. Semi circles are drawn on PQ and QS as diameters. Find the perimeter and area of the region so obtained.
The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes.
ABC is a right angled triangle, angle B=90* ,AB=28cm and BC=21cm. With AC as diameter a semicircle is drawn and with BC as radius a quarter cicle is drawn. Find the area of the shaded region
Two circular flower beds have been shown on two sides of a square lawn ABCD of side 56 cm. If the centre of each circular flower bed is the point of intersection O of the diagonals of of the square lawn, find the sum of the areas of the lawn and flower beds.
In the given figure, a square OABC is inscribed in a quadrant OPBQ. If OA = 20 cm, find the area of the shaded region. [Use π = 3.14]
What is the formula to calculate the Area to a sector?
the long and short hands of a clock are 6cm and 4cm respectively.Find the sum of distances travelled by their tips in a day
Three circles of radius 2 cm touch one another externally. These circles are circumscribed by a circle of radius x. Find the value of x and the area of shaded region
an equilateral triangle abc of side 6 cm has been inscribed in a circle . find the area of the shaded region . thai is the remaining part of the circle
ABCD is a trapezium with AB parallel to CD. AB=18cm, DC=32cm and distance between AB and DC=14cm. If arcs of equal radii 7cm with centres A,B,C and D have been drawn, then find the remaining area i.e. area exuding the circular region
a motor cycle has diameter 91cm there are 22 spokes in the wheel find the length of the arc between the 2 adjoining spokes
AB=36 cm and M is the mid-point of AB. Semicircles are drawn on AB,AM and Mb as diametrs.A circle with centre C touches all the three circles. Find the area of the shaded region.
An elastic belt is placed round the rim of a pulley of radius 5 cm. One point on the belt is pulled directly away from the centre O of the pulley until it is at P, 10 cm from O.find the length of the belt that is in contact with the rim of the pulley.
In the given figure, ABC is a quadrant of a circle of radius 14 cm and a semicircle is drawn with BC as diameter. Find the area of the shaded region.
two circles touch internally, the sum of their areas is 116 pie sq cm and distances between their centres is 6cm. find the radii of the circles.
plzzzzz ans!!!! its urgent!!!
IN FIG. given along side abc is a right triangle angle B=90o ,AB= 28 cm and BC =21 cm .With AC as diameter a semicircle is drawn and iwth BC as radius a quarter circle is drawn .Find the area of shaded region correct to two decimal places.
The boundary of the shaded region in the figure given consists of four semi-circular arcs, the smallest two being equal. If the diameter of the larger is 14 cm and of the smallest is 3·5 cm, calculate the length of the boundary and the area of the shaded region. (Take = 22/7).
Find to the three places of decimal the radius of the circles whose area is the sum of the areas of two triangles whose sides are 35,53,66and 33,56,65 measured in centimeters.
1] the perimeter of a quadrant of a circle of radius ' r ' is ___________.
2] Area of a quadrant of circle whose circomference is 22cm is ____________.
Four equal circles are described about four corners of a square so that each touches two of the others, as shown in fig. Find the area of the shaded region, each side of the square measuring 14cm
in the fig O is the centre of circle with AC =24cm and AB=7 cm. and angle BOD =90. find the area of the shaded region..
NOT ABLE TO UPLOAD THE DIAGRAM....
its like a circle a diamete.two semicircles are thus formed.
one upper side of the diameter a triangleABC is formed with BC as its base n BC is the diameter...the on the lower side of the diameter the portion i.e the semicircle is biscetedby OD the radius...
IN the triangle AB is the smallest side AB the longest n AC the shortest...
pls make it as soon as possible tommorow is my maths exam...pls
In a circular table cover of radius 32 cm, a design is formed leaving an equilateral triangle ABC in the middle as shown in the given figure. Find the area of the design (Shaded region).
A chord of a circle of radius 12 cm subtends an angle of 120° at the centre. Find the area of the corresponding segment of the circle. please explain me in easy way?
circle of radius 2cm is inscribed in an equilateral triangle find the area of the triangla
In figure, ABC is a right angled triangle, right angled at A. Semicircles are drawn on AB, AC and BC as diameters. Find the area of the shaded region.
Please see the figure:http://puu.sh/2e9qw
A chord 10cm long is drawn in a circle whose radius is 5 root2 cm find the area of both segments.?
a wooden article was made by scooping out a hemisphere from each end of a solid cylinder.I the height of the cylinder is 10cm and it's base radius is 3.5cm. find it total s.a.
Find the area of the shaded region in the given figure, where a circular arc of radius 6 cm has been drawn with vertex O of an equilateral triangle OAB of side 12 cm as centre.
NCERT MATHS exercise 12.2 question 3
M
pls explain me
please expert explain me how did u found out the root of 1050 in the following answer
The area of a circle inscribed in an equilateral triangle is 154 cm2. Find the perimeter of the triangle.
in a circle of diameter 40 cm, a rhombus is inscribed with all its vertices on the circle. Find the area of rhombus
The inner circumference of the circular track is 440 m and the track is 14 m wide.Calculate the cost of levelling the track at the rate of 25 paise per sq. m.Also, find the cost of fencing the outer circle at the of Rs. 5 per m.[Use pi = 22/7]
In an equilateral triangle of side 24cm , a circle is inscribed touching its sides . Find the area of the remaining portion of the triangle .
Two spherical balls lie on the ground touching ,if one ball has a radius of 8 units and the point of contact is 10 units above the ground what is the radius of the other ball?
A chord of circle subtends an angle 'Theta' at centre of the circle.
The area of the minor segment cut off by the chord is one eighth of the area of the circle.
Prove that 8Sin(theta)/2 * Cos(theta) + (PI) = (PI)(Theta)/45
Fig shows a sector of a circle, centre O containing an angle θ.Find the perimeter and area of the shaded region.find i) perimeter = r (tan θ + sec θ + πθ/180 – 1) ii)Area = r2/2(tan θ – πθ /180)
i need fully solved ..........hurry please....
an archery target has 3 regions formed by three concentric circles. if the diameters of the concentric circles are in the ratio 1:2:3, then find the ratio of the areas of the regions???
guys plz help me....
need this answer before 10:30 am today...
Find the area of a quadrant of a circle whose circumference is 22cm.
The inside perimetre of a running track is 400m. The length of each of the straight portion is 90m and the ends are semi-circles. If the track is everywhere 14m wide, find the area of the track. Also find the length of the outer running track.
The circumference of a circle exceeds its diameter by 16.8 cm. Find the circumfrence of the circle.
gyan has a car whose wheel are 60 com diameter how many complete revolution does each wheel make in 15 minutes when the car is ravelling at a speed of 60km/hr
all the vertices of a rhombus lie on a circle. find the area of the rhombus if the area of the circle is 1256cm2
how to learn trignometry ratios suggest smple method
a bicycle wheel makes 5000 revolutions in moving 11km find diameter of the wheel
O is the center of a circle. The area of sector is 5/18 of area of circle. Find the angle sub tended at the center
Q=AB is the diameter of a circle,center O .C is a point on the circumference such that /-COB=a.The area of minor segment cut off by AC is equal to twice the area of the sector BOC. Prove that
sin a/2 cos a/2 =pie(1/2- a/120)
With vertices A,B and C of a triangle ABC as centres, arcs are drawn with 5cm each. With sides AB=14cm, BC=48cm and CA =50cm, find Area of whole triangle minus the sum of the three sectors
ABCD is a trapezium AB ||DC and angle BCD =60 degree.if befc is sector with center C and ab=bc=7cm and de=4 cm ,then find the area of the shaded region?
Two Concentric Circles of radii A and B ( A>B) are given. the Chord AB of larger circle touches the smaller circle at C. The length of AB is
If a, b and c are the sides of a right angle triangle where C is the hypotenuse. Prove that radius, r of the circle touches the sides of the triangle given by r=a+b-c
2
1. the shape of the top of a table in a restaurant is that of a sector of a circle with centre O an dang;e bod=90. if bo=od=60cm, find the area of the table and the perimeter of the table top.
2. triangle ABC is right angled at A. semicircles are drawn on AB, AC and BC as diameters. find the area of the shaded region .
3.OPQR is a rhombus , three of whose vertices lie on a circle with centre O. if the area of the rhombus is 32root3 cm sq. , find the radius of the circle.
4.O is the centre of the biggre circle an dAC is the diameter. another circle with AB as diameter is drawn. if AC=54cm and BC=10cm, find the area of the shaded region.
ABCP is a quadrant of a circle of radius 14 cm With AC as a diameter, a semicircle is drawn. Find the area of the shaded region. (Take Pi=22/7)
The figure consists of a rt. angled triangle ABC, with AC as the hypotenuse. A semicircle APC is drawn with AC as the diameter. Over this, another the arc of the quadrant extends. The shaded region is between the arc of the semicircle and the arc of the quadrant.
what is the formula of area of minor segment and major segment?
The area of an equilateral triangle ABC is 17320.5 cm2. With each vertex of the triangle as centre, a circle is drawn with radius equal to half the length of the side of the triangle (See the given figure). Find the area of shaded region. [Use π = 3.14 and]
plz answer this question....and plz tell me step by step......can anyone...help me..
in a circle with centre o.the area of sector oAPB is 5/18 of the area find the area of x
In RD Sharma Chapter 15 : Areas related to circles: Revision exercise Question 32, how is the radius of the circle with centre C ,1/6th of AB ..???
3 circles each of radius 3.5 cm are drawn in such a way that each of them touches the other two . find the area enclosed between these three cicles (shaded region )use pie=22/7?
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Syllabus
In fig Op is equal to diameter of the circle. Prove that abp is a equilateral triangle..
sry abt the figure but i dnt know how to upload the figure
But its a circle with two tangents AP and BP... and joining OP, OA and OB ( o is the centre of the circle... )
1. To give suggestive demonstration of formula that the area of the circle is half the product of its circumfrence and radius
a)by coiling method
b)by paper cutting and pasting.
2.to verify that the sum of first n odd natural number is n2 by an activity method.
3.To verify that the sum of area of three sectors of same radii 'r' formed at the vertices (as centre) of any triangle
r2/2using paper cutting and pasting.
4.
a)to compare the curves surface area of two right circular cylinder which are formed rectangular sheet of paper having same dimension.
b)to compare total surface area of two right circular cylinder s which are formed from rectangular sheet of paper having same dimension.
5.to compare the volume of two right circular cylinder which are formed rectangular sheet of paper having same dimension.
6.to illustrate the medians of a triangle concur at a point called thecentroid,which always lies inside the circle using paper folding mehod.
plz send SOLUTION FAST AS MUCH POSSIBLE ON
siddhantbhopal@gmail.com
OPQR is a rhombus, three of whose vertices lie on a circle with centre O. If the area of the rhombus is 32 (under-root)3 cm2, find the radius of the circle.
The radius of a circle is 5 cm. A chord of length square root 50 cm is drawn in the circle. Find the area of the major segment.
Answer given in the book is 71.375 square cm
Whereas my calculation gives 71.428 sq cm
Kindly, check it?
The radius of a circle is 5 cm. A chord of length square root 50 cm is drawn in the circle. Find the area of the major segment.
Answer given in the book is 71.375 square cm
Whereas my calculation gives 71.428 sq cm
Kindly, check it?
The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour?
please write in a simple method?
AB is one of the direct common tangent of two circles ofradii 12cm and 4cmrespectively touching each other.find the area enclosed by the circles and the tangent.
PQRS is a diameter of a circle of radius 6cm. The lengths PQ, QR and RS are equal. Semi circles are drawn on PQ and QS as diameters. Find the perimeter and area of the region so obtained.
The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes.
The question for the answer is: In a circular table of radius 32 cm, a design is formed leaving an equilateral triangle ABC in the middle as shown in the given figure. Find the area of the design(shaded region)
ABC is a right angled triangle, angle B=90* ,AB=28cm and BC=21cm. With AC as diameter a semicircle is drawn and with BC as radius a quarter cicle is drawn. Find the area of the shaded region
Given: ABCD is a square
Find : Area of the shaded region
Two circular flower beds have been shown on two sides of a square lawn ABCD of side 56 cm. If the centre of each circular flower bed is the point of intersection O of the diagonals of of the square lawn, find the sum of the areas of the lawn and flower beds.
Q: ABC is a triangle right angle at A. Find the area of the shaded region if AB and BC as sides and AC as hypotenuse. An incircle XYZ is inscribed in it with points X,Y,Z on sides AB, BC, CA respectively, and centre O. Prove that:
OX =OY = OZ = (AB + BC - AC)/2
In the given figure, a square OABC is inscribed in a quadrant OPBQ. If OA = 20 cm, find the area of the shaded region. [Use π = 3.14]
What is the formula to calculate the Area to a sector?
the long and short hands of a clock are 6cm and 4cm respectively.Find the sum of distances travelled by their tips in a day
Three circles of radius 2 cm touch one another externally. These circles are circumscribed by a circle of radius x. Find the value of x and the area of shaded region
an equilateral triangle abc of side 6 cm has been inscribed in a circle . find the area of the shaded region . thai is the remaining part of the circle
ABCD is a trapezium with AB parallel to CD. AB=18cm, DC=32cm and distance between AB and DC=14cm. If arcs of equal radii 7cm with centres A,B,C and D have been drawn, then find the remaining area i.e. area exuding the circular region
a motor cycle has diameter 91cm there are 22 spokes in the wheel find the length of the arc between the 2 adjoining spokes
AB=36 cm and M is the mid-point of AB. Semicircles are drawn on AB,AM and Mb as diametrs.A circle with centre C touches all the three circles. Find the area of the shaded region.
An elastic belt is placed round the rim of a pulley of radius 5 cm. One point on the belt is pulled directly away from the centre O of the pulley until it is at P, 10 cm from O.find the length of the belt that is in contact with the rim of the pulley.
In the given figure, ABC is a quadrant of a circle of radius 14 cm and a semicircle is drawn with BC as diameter. Find the area of the shaded region.
two circles touch internally, the sum of their areas is 116 pie sq cm and distances between their centres is 6cm. find the radii of the circles.
plzzzzz ans!!!! its urgent!!!
IN FIG. given along side abc is a right triangle angle B=90o ,AB= 28 cm and BC =21 cm .With AC as diameter a semicircle is drawn and iwth BC as radius a quarter circle is drawn .Find the area of shaded region correct to two decimal places.
The boundary of the shaded region in the figure given consists of four semi-circular arcs, the smallest two being equal. If the diameter of the larger is 14 cm and of the smallest is 3·5 cm, calculate the length of the boundary and the area of the shaded region. (Take
= 22/7).
Find to the three places of decimal the radius of the circles whose area is the sum of the areas of two triangles whose sides are 35,53,66and 33,56,65 measured in centimeters.
1] the perimeter of a quadrant of a circle of radius ' r ' is ___________.
2] Area of a quadrant of circle whose circomference is 22cm is ____________.
Four equal circles are described about four corners of a square so that each touches two of the others, as shown in fig. Find the area of the shaded region, each side of the square measuring 14cm
in the fig O is the centre of circle with AC =24cm and AB=7 cm. and angle BOD =90. find the area of the shaded region..
NOT ABLE TO UPLOAD THE DIAGRAM....
its like a circle a diamete.two semicircles are thus formed.
one upper side of the diameter a triangleABC is formed with BC as its base n BC is the diameter...the on the lower side of the diameter the portion i.e the semicircle is biscetedby OD the radius...
IN the triangle AB is the smallest side AB the longest n AC the shortest...
pls make it as soon as possible tommorow is my maths exam...pls
In a circular table cover of radius 32 cm, a design is formed leaving an equilateral triangle ABC in the middle as shown in the given figure. Find the area of the design (Shaded region).
A chord of a circle of radius 12 cm subtends an angle of 120° at the centre. Find the area of the corresponding segment of the circle. please explain me in easy way?
circle of radius 2cm is inscribed in an equilateral triangle find the area of the triangla
In figure, ABC is a right angled triangle, right angled at A. Semicircles are drawn on AB, AC and BC as diameters. Find the area of the shaded region.
Please see the figure:http://puu.sh/2e9qw
A chord 10cm long is drawn in a circle whose radius is 5 root2 cm find the area of both segments.?
a wooden article was made by scooping out a hemisphere from each end of a solid cylinder.I the height of the cylinder is 10cm and it's base radius is 3.5cm. find it total s.a.
Find the area of the shaded region in the given figure, where a circular arc of radius 6 cm has been drawn with vertex O of an equilateral triangle OAB of side 12 cm as centre.
NCERT MATHS exercise 12.2 question 3
M
pls explain me
please expert explain me how did u found out the root of 1050 in the following answer
The area of a circle inscribed in an equilateral triangle is 154 cm2. Find the perimeter of the triangle.
in a circle of diameter 40 cm, a rhombus is inscribed with all its vertices on the circle. Find the area of rhombus
The inner circumference of the circular track is 440 m and the track is 14 m wide.Calculate the cost of levelling the track at the rate of 25 paise per sq. m.Also, find the cost of fencing the outer circle at the of Rs. 5 per m.[Use pi = 22/7]
In an equilateral triangle of side 24cm , a circle is inscribed touching its sides . Find the area of the remaining portion of the triangle .
Two spherical balls lie on the ground touching ,if one ball has a radius of 8 units and the point of contact is 10 units above the ground what is the radius of the other ball?
A chord of circle subtends an angle 'Theta' at centre of the circle.
The area of the minor segment cut off by the chord is one eighth of the area of the circle.
Prove that 8Sin(theta)/2 * Cos(theta) + (PI) = (PI)(Theta)/45
Fig shows a sector of a circle, centre O containing an angle θ.
Find the perimeter and area of the shaded region.
find i) perimeter = r (tan θ + sec θ + πθ/180 – 1)
ii)Area = r2/2(tan θ – πθ /180)
i need fully solved ..........hurry please....
Two circles with centres p and q are shown in the figure. The area of rectangle ABCD is 15 sq. cm.
Find the area of triangle QPT
an archery target has 3 regions formed by three concentric circles. if the diameters of the concentric circles are in the ratio 1:2:3, then find the ratio of the areas of the regions???
guys plz help me....
need this answer before 10:30 am today...
Quickly answer
Find the area of a quadrant of a circle whose circumference is 22cm.
The inside perimetre of a running track is 400m. The length of each of the straight portion is 90m and the ends are semi-circles. If the track is everywhere 14m wide, find the area of the track. Also find the length of the outer running track.
The circumference of a circle exceeds its diameter by 16.8 cm. Find the circumfrence of the circle.
gyan has a car whose wheel are 60 com diameter how many complete revolution does each wheel make in 15 minutes when the car is ravelling at a speed of 60km/hr
all the vertices of a rhombus lie on a circle. find the area of the rhombus if the area of the circle is 1256cm2
how to learn trignometry ratios suggest smple method
a bicycle wheel makes 5000 revolutions in moving 11km find diameter of the wheel
O is the center of a circle. The area of sector is 5/18 of area of circle. Find the angle sub tended at the center
Q=AB is the diameter of a circle,center O .C is a point on the circumference such that /-COB=a.The area of minor segment cut off by AC is equal to twice the area of the sector BOC. Prove that
sin a/2 cos a/2 =pie(1/2- a/120)
With vertices A,B and C of a triangle ABC as centres, arcs are drawn with 5cm each. With sides AB=14cm, BC=48cm and CA =50cm, find Area of whole triangle minus the sum of the three sectors
ABCD is a trapezium AB ||DC and angle BCD =60 degree.if befc is sector with center C and ab=bc=7cm and de=4 cm ,then find the area of the shaded region?
Two Concentric Circles of radii A and B ( A>B) are given. the Chord AB of larger circle touches the smaller circle at C. The length of AB is
If a, b and c are the sides of a right angle triangle where C is the hypotenuse. Prove that radius, r of the circle touches the sides of the triangle given by r=a+b-c
2
1. the shape of the top of a table in a restaurant is that of a sector of a circle with centre O an dang;e bod=90. if bo=od=60cm, find the area of the table and the perimeter of the table top.
2. triangle ABC is right angled at A. semicircles are drawn on AB, AC and BC as diameters. find the area of the shaded region .
3.OPQR is a rhombus , three of whose vertices lie on a circle with centre O. if the area of the rhombus is 32root3 cm sq. , find the radius of the circle.
4.O is the centre of the biggre circle an dAC is the diameter. another circle with AB as diameter is drawn. if AC=54cm and BC=10cm, find the area of the shaded region.
ABCP is a quadrant of a circle of radius 14 cm With AC as a diameter, a semicircle is drawn. Find the area of the shaded region. (Take Pi=22/7)
The figure consists of a rt. angled triangle ABC, with AC as the hypotenuse. A semicircle APC is drawn with AC as the diameter. Over this, another the arc of the quadrant extends. The shaded region is between the arc of the semicircle and the arc of the quadrant.
what is the formula of area of minor segment and major segment?
The area of an equilateral triangle ABC is 17320.5 cm2. With each vertex of the triangle as centre, a circle is drawn with radius equal to half the length of the side of the triangle (See the given figure). Find the area of shaded region. [Use π = 3.14 and
]
plz answer this question....and plz tell me step by step......can anyone...help me..
in a circle with centre o.the area of sector oAPB is 5/18 of the area find the area of x
In RD Sharma Chapter 15 : Areas related to circles: Revision exercise Question 32, how is the radius of the circle with centre C ,1/6th of AB ..???
3 circles each of radius 3.5 cm are drawn in such a way that each of them touches the other two . find the area enclosed between these three cicles (shaded region )use pie=22/7?