What statement is used to prove quadrilateral ABCD is a parallelogram

Question

asked Sep 17, 2019 73.4k views

2 Answers

RockZ · Answer 1 · 2019-09-18T16:19:17+0000

The correct answer is the second choice:

<BCD + <CDA = 180

This fact implies BC and AD are parallel which is the essential property of a parallelogram.

Paulo Roberto · Answer 2 · 2019-09-21T02:12:35+0000

Answer:

I believe D is the answer. (Triangles BPA and DPC are congruent.)

Angles BAD and ADC are not congruent.

Sides CD and DA are also not congruent