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Question

Question 9

Draw an angle of 40 Copy its supplementary angle.

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Solution

Steps of construction:

(a) Draw an angle of 40 with the help of protractor, naming AOB
(b) Draw a line PQ.
(c) Take any point M on PQ.
(d) Place the compasses at O and draw an arc to cut the rays of AOB at L and N.
(e) Use the same compasses setting to draw an arc with O as centre, cutting MQ at X.
(f) Set your compasses to length LN with the same radius.
(g) Place the compasses at X and draw the arc to cut the arc drawn earlier at Y.
(h) Join MY. Thus, QMY=40 and PMY is supplementary of it


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