IM Geometry Unit 2 Lesson 13 Cool Down
Given: ABCD is a parallelogram with AB parallel to CD and AC parallel to BC. Diagonal AC
is congruent to diagonal BD.
Prove: ABCD is a rectangle (angles A, B, C, and D are right angles.)
IM G Unit 2 Lesson 13 from IM Geometry by Illustrative Mathematics, https://im.kendallhunt.com/HS/students/2/2/13/index.html. Licensed under the Creative Commons Attribution 4.0 license, https://creativecommons.org/licenses/by/4.0/.