A 40∘ angle can be drawn by drawing the angle bisector of a given 80∘ angle.
False
An angle bisector divides a given angle into two equal halves. So bisecting a given 80∘ angle will give two 40∘ angles.
A 75∘ angle can be made by drawing angle bisector between a 90∘ angle arm and a ___ ∘arm.