Question

is this quadrilateral a parallelogram?If yes, state the definition or theorem that justifies your answer.​

Answer 1

yes, this quadrilateral is a parallelogram.

Explanation:

Above quadrilateral ,

opposite angle 70=70

and there is also 180-70=110 (linear pair)

so, others opposite angle 110=110

This quadrilateral have opposite sides equal

so, this is parallelogram.