Question

how to draw arc of 90​

Answer 1

first open the compass of any radius.. draw an arc with centre O and it will form an angle of 180 . Now with the same radius draw an arc. This is 60° . Now with same radius keep the compass on the arc of 60° and draw an arc. this is 120°. Now keep the compass on 60° and 120° and draw two intersecting arcs. Join the intersecting arcs with O. the obtained angle is 90° ....

Hope it will help you..

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