im.g.2.13.2 The diagonals of a parallelogram


Conjecture: "The diagonals of a parallelogram bisect each other." 1. Construct point D that makes ABCD a parallelogram. Verify your choice works for all conditions by doing a drag test of each of the vertices. 2. Use the polygon tool to make parallelogram ABCD. Color it green. 3. Construct the diagonals of ABCD. Use the intersection tool to make the intersection point. It should be E. If it isn't re-label it "E." 4. Convince yourself that the conjecture is true. Return to desmos to answer the remaining questions.


Illustrative Mathematics. geometry. unit 2. Lesson 13. Proofs about Parallelograms Licensed under the Creative Commons Attribution 4.0 license,