Question

if one angle of a parallelogram is a right angle prove that the other angles are also right angles. ​

Answer 1

Answer:

If one ange is right angle ,

the opposite one would be equal hence 90°.

Let parallelogram be ABCD,

<A = 90° (given)

<C = <A = 90° ( opposite)

<A+<B = 180° ( adjecent angles are supplementary)

<B = 90°

<D= 90° ( opposite to <B)

Hence ,

<A=<B=<C=<D=90°

Step-by-step explanation: