Draw an angle of 40 Copy its supplementary angle - Maths - Practical Geometry

Question

Draw an angle of 40° Copy its supplementary angle

Gopal Mohanty · Accepted Answer

The below given steps will be followed to construct an angle of 40º measure and the copy of its supplementary angle (1) Draw a line segment

and mark a point O on it Place the centre of the protractor at point O and the zero edge along line segment

(2) Mark a point A at 40º Join OA OA is the required ray making 40º with

Ð POA is the supplementary angle of 40º (3) Draw an arc of convenient radius in the interior of Ð POA, while taking point O as centre Let it intersect both rays of Ð POA at point B and C (4) Draw a line m and mark a point S on it With the same radius as used before, again draw an arc while taking point S as centre Let it cut the line m at point T (5) Now, adjust the compasses up to the length of BC With this radius, draw an arc while taking T as centre, which will intersect the previously drawn arc at point R (6) Join RS RS is the required ray which makes the same angle with line m, as the supplementary of 40º is 140º

Draw an angle of 40°. Copy its supplementary angle.