Question

if one angle of a parallelogram is right angle prove that it is a rectangle

Answer 1

Prove: A parallelogram with one right angle is a rectangle (Theorem).

Theorem

A parallelogram with one right angle is a rectangle.



If ABCD is a parallelogram and ∠A = 90°, then ∠A =∠B =∠C = ∠D = 90°.

Answer 2

a parallelogram with a right angle is a rectangle (theorem).