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# Precious Parallelograms

Lesson 2 of 8

## Objective: SWBAT prove key theorems relating to parallelograms, like opposite sides are congruent and opposite angles are congruent

#### Resources

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The activity/homework asks students to look for repeated reasoning to use coordinate geometry to find the 4th point in a parallelogram (MP8). Although the questions are scaffolded for students questions #1-7 and the proof #8 require students to work through and persevere through both challenging problems, just as they were required to in the proofs earlier in class (MP1).

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Ok, I just assumed that the material you have here went in order of how you taught it.

| 3 years ago | Reply

Hi Amanda,

We cover congruent triangles prior to quads so this is why we can use ASA. HOpe that helps!

| 3 years ago | Reply

Probably getting tired of me asking questions, and I know there is no way I will know before I teach this lesson, but I am having trouble with the 1st proof in the notes. How do you prove the sides congruent if you have not covered angle/side/angle?

| 3 years ago | Reply*expand comments*

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