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IM G Unit 2 Lesson 7 Cool Down

In class we proved that one pair of parallel sides in a parallelogram must be congruent. Add to your proof to prove that both pairs of parallel sides in a parallelogram must be congruent. You may use the GeoGebra app above to illustrate your proof.

IM G Unit 2 Lesson 7 from IM Geometry by Illustrative Mathematics, https://im.kendallhunt.com/HS/students/2/2/7/index.html. Licensed under the Creative Commons Attribution 4.0 license, https://creativecommons.org/licenses/by/4.0/.