Question

prove that opposite sides and opposite angle of a parallelogram are congruent​

Answer 1

Answer:

ABCD is a parallelogram, AD||BC and AB||DC. Prove that ∠BAD ≅ ∠DCB and that ∠ADC ≅ ∠CBA. There are two ways to go about this. ... To show these two triangles are congruent we'll use the fact that this is a parallelogram, and as a result, the two opposite sides are parallel, and the diagonal acts as a transversal line.