Question

in figure second ad is equal to BC and AD parallel BC is equal to DC give reasons in support of your answer​

Answer 1

We have been given:-

AD = BC

AD || DC

We also know that any quadrilateral is a parallelogram if a pair of its sides is equal and parallel.

Here, both the conditions are satisfied.

So, we can say that ABCD is a ||gm.

That means AB = DC because it is a pair of opposite sides of a parallelogram.