A 75∘ angle can be made by drawing angle bisector between a 90∘ angle arm and a
75∘=90∘+60∘2 Hence bisecting 90∘ and 60∘ will give 75∘.
A 40∘ angle can be drawn by drawing an angle bisector of a given 80∘ angle.
Draw an angle 125∘ and take point A on one of its arm and B on the second arm such that OA = OB. Draw the perpendicular bisector of OA and OB. [4 MARKS]