Question

how to prove that each angle of rectangle is 90 degree

Answer 1

first we take the rectangle then angle a =90 thenc=90 then d=90 b=90

Answer 2

To prove.. Show that each angle of rectangle is a right angle.

Given. ABCD is a rght triangle... Assume the picture..

To prove. Angle A= angle B= angle C= angle D

proof we know that rectangle is a parallelogram one angle is 90.
Hence.. Let assume that angle A =90

now angle AD parallel to BC.... opp. Sides of a parallelogram is equal.
and A B is a transversal.
Angle A + Angle B =180... interior angles on the same side of transversal are supplementary...



Hope it helps u