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Shreya Bharti
Subject: Maths
, asked on 7/4/18
Ans fast experts
Q.77. The two vertices of a triangle are (6, 3) and (- 1, 7) and its centroid is (1, 5). Then the third vertex is
(A) (2, 5)
(B) (2, - 5)
(C) (- 2, - 5)
(D) (- 2, 5)
Answer
2
Son Ser
Subject: Maths
, asked on 31/3/18
In the given figure, PR, RT and PT are tangents to the circle at Q, S and U respectively.
If PR = (RT + 3) cm, PR = (PT + 1) cm and perimeter of ∆PRT is 26 cm, then QR + RT equal to:
(A) 9 cm (B) 7 cm (C) 13 cm (D) 11 cm
Answer
2
Champ Jee
Subject: Maths
, asked on 30/3/18
Experts, please explain in neat manner (tabular or any comfortable way u want):
What is circumcentre, orthocentre, incentre and centroid? What are their properties and how can they be constructed and their specific properties! Please!
Answer
10
Anubhav Gautam
Subject: Maths
, asked on 27/3/18
q 21
Prove that the tangent drawn at the mid-point of an arc of a circle is
parallel to the chord joining the end points of the arc.
Answer
1
Raghav Singh
Subject: Maths
, asked on 27/3/18
Q). This is a figure from circles chapter in which we have to prove QA = AR , also we know PQ = PR. What I did is I made perpendicular by joining PA then by PA = PA COMMON AND PAQ = PAR = 90 DEGREE AND PQ = PR. I proved them to be congruent . Now by cpct i said QA = AR, but this is from chapter circles so that does that means that for examiner my answer is wrong? I am worried because this type of figure is having both triangles and circles and also both are there in the syllabus . How will i know that from which chapter is examiner taking reference?
Answer
1
Raghav Singh
Subject: Maths
, asked on 27/3/18
how are these green angles equal please explain.
Answer
2
Rajeeb Biswas
Subject: Maths
, asked on 27/3/18
pls solve
Q95. Quadrilateral PQRS circumscribes a circle. Find the degree measures of x and y.
Answer
3
Simran Dalvi
Subject: Maths
, asked on 27/3/18
Solve this:
AB=12, CD= 1,
$\angle $
BAC=
${90}^{\xb0}$
,
and the semicircle is tangent to BC, find
the radius of the semicircle.
Answer
1
Simran Dalvi
Subject: Maths
, asked on 27/3/18
Solve this:
23. A circle is inscribed in
$\u2206$
ABC having sides AB =8cm, BC=7 cm and AC =5 cm. Find AD,BE and CF
Answer
1
अर्कज ..
Subject: Maths
, asked on 26/3/18
Solve this:
QExample 3
: PQ is a chord of length 8 cm of a circle of radius 5 cm. The tangents at P and Q intersect at a point T (see Fig. 10.10). Find the length TP.
Solution :
Join OT. Let it intersect PQ at the point R. Then
$\u2206$
TPQ is isosceles and TO is the angle bisector of
$\angle $
PTQ . So, OT
$\perp $
PQ and therefore, OT bisects PQ which gives PR = RQ = 4 cm.
Also, PR =
$\sqrt{{\mathrm{OP}}^{2}-{\mathrm{PR}}^{2}}=\sqrt{{5}^{2}-{4}^{2}}\mathrm{cm}=3\mathrm{cm}$
Answer
1
Payal Arora
Subject: Maths
, asked on 26/3/18
Q. Find AD
Answer
2
Mohit Sharma
Subject: Maths
, asked on 26/3/18
Solve this :
20. In the adjoining figure, O is the centre of a circle of radius 5 cm. T is a point such that OT = 13cm and OT intersects circle at E. If AB is tangent to the circle at E, find the length of AB, where TP and TQ are two tangents to the circle.
Answer
2
Charulatha
Subject: Maths
, asked on 26/3/18
Answer this question fastly....
Answer
1
Manthra Bhaskar 💙🖤🖤...
Subject: Maths
, asked on 25/3/18
Solve this
Q. In the Figure, XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting XY at A and X'Y' at B. Prove that
$\angle $
AOB = 90°.
Answer
1
Durga Prasad. R
Subject: Maths
, asked on 25/3/18
Solve this:
Q40. In figure. Chords AB and CD intersect at P. If AB = 5 cm, PB = 3 cm PD = 4 cm. Find the length of CD.
Answer
3
1
2
3
4
5
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What are you looking for?

Q.77. The two vertices of a triangle are (6, 3) and (- 1, 7) and its centroid is (1, 5). Then the third vertex is

(A) (2, 5)

(B) (2, - 5)

(C) (- 2, - 5)

(D) (- 2, 5)

If PR = (RT + 3) cm, PR = (PT + 1) cm and perimeter of ∆PRT is 26 cm, then QR + RT equal to:

(A) 9 cm (B) 7 cm (C) 13 cm (D) 11 cm

What is circumcentre, orthocentre, incentre and centroid? What are their properties and how can they be constructed and their specific properties! Please!

Prove that the tangent drawn at the mid-point of an arc of a circle is

parallel to the chord joining the end points of the arc.

Q). This is a figure from circles chapter in which we have to prove QA = AR , also we know PQ = PR. What I did is I made perpendicular by joining PA then by PA = PA COMMON AND PAQ = PAR = 90 DEGREE AND PQ = PR. I proved them to be congruent . Now by cpct i said QA = AR, but this is from chapter circles so that does that means that for examiner my answer is wrong? I am worried because this type of figure is having both triangles and circles and also both are there in the syllabus . How will i know that from which chapter is examiner taking reference?

Q95. Quadrilateral PQRS circumscribes a circle. Find the degree measures of x and y.

AB=12, CD= 1, $\angle $BAC= ${90}^{\xb0}$ ,

and the semicircle is tangent to BC, find

the radius of the semicircle.

23. A circle is inscribed in $\u2206$ABC having sides AB =8cm, BC=7 cm and AC =5 cm. Find AD,BE and CF

QExample 3: PQ is a chord of length 8 cm of a circle of radius 5 cm. The tangents at P and Q intersect at a point T (see Fig. 10.10). Find the length TP.Solution :Join OT. Let it intersect PQ at the point R. Then $\u2206$ TPQ is isosceles and TO is the angle bisector of $\angle $PTQ . So, OT $\perp $PQ and therefore, OT bisects PQ which gives PR = RQ = 4 cm.Also, PR = $\sqrt{{\mathrm{OP}}^{2}-{\mathrm{PR}}^{2}}=\sqrt{{5}^{2}-{4}^{2}}\mathrm{cm}=3\mathrm{cm}$

Solve this :20. In the adjoining figure, O is the centre of a circle of radius 5 cm. T is a point such that OT = 13cm and OT intersects circle at E. If AB is tangent to the circle at E, find the length of AB, where TP and TQ are two tangents to the circle.

Q. In the Figure, XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting XY at A and X'Y' at B. Prove that $\angle $AOB = 90°.

Q40. In figure. Chords AB and CD intersect at P. If AB = 5 cm, PB = 3 cm PD = 4 cm. Find the length of CD.