Question

Show that each angle of a square is a right angle​

Answer 1

Sum of exterior angles of an n sided regular polygon is 360°

Magnitude of each exterior angle=360°/n

Square is a 4 sided regular polygon

So each exterior angle=360°/4=90°

Interior angle + exterior angle=180°

So interior angle =180°- exterior angle

Interior angle of square=180°-90°=90°