Question

In the given figure, ABCD is a quardilater in which angleA= angleB= angleC= angleD= 90°.Prove that AD || BC and AB ||DC.Give reasons in support of your answer. ​

Answer 1

Step-by-step explanation:

A quadrilateral whose all angles are of 90° is either a rectangle or a square.

and in a rectangle or square the opposite side are equal and parallel to each other

thus in ABCD quadrilateral ADIIBC and ABIIDC.