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Tests for Parallelograms

In this tests for parallelograms activity, 10th graders solve 7 various types of geometry problems that include parallelograms. First, they determine if each quadrilateral is a parallelogram and justify their answers. Then, students find the values of x and y that ensure each quadrilateral is a parallelogram and identify the sub-goals they would need to complete the proof at the bottom.

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