Question

In quadrilateral ABCD, ∠A + ∠D = 180º. What special name can be given to this quadrilateral?

Answer 1

Given: In quadrilateral ABCD, ∠A + ∠D = 180º.

We know that the sum of the two consecutive angle is 180º.

So, pair of opposite side AB and CD are parallel.

Since, the quadrilateral ABCD is trapezium.

Hence, special name can be given to this quadrilateral is trapezium.