## cbrusoe 3 years ago Theorem: If the diagonals of a parallelogram are congruent, then each angle of the parallelogram is a right angle. Kim is writing the proof of the theorem using the properties of a parallelogram shown below. • The opposite sides of a parallelogram are parallel. • The opposite sides of a parallelogram are congruent. A parallelogram ABCD with diagonals AC and BD. She proved the theorem by showing that triangle ADC is congruent to triangle CBA using the _________ Postulate.

1. AcidRa1n

2. AcidRa1n

Side angle side?

3. AcidRa1n

SAS

4. AcidRa1n

Is that what your looking for?

5. cbrusoe

i think so thank-you!

6. AcidRa1n

7. JayDS

yep he is right.

8. cbrusoe

9. AcidRa1n

Thanks lol

10. cbrusoe

mhmm np haha

11. that1chick

I think its SSS.... • The opposite sides of a parallelogram are parallel. • The opposite sides of a parallelogram are congruent. they are both talking about sides.............

12. that1chick

nvr mind, I found the angle Theorem: If the diagonals of a parallelogram are congruent, then each angle of the parallelogram is a right angle. So I concure with them lol