# Prove It (Part 2)

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## Objective

Students will be able to use similar right triangles to prove the Pythagorean Theorem, and then work on identifying common student errors when using the theorem.

#### Big Idea

Students work on proving hypotheses â and end up proving the Pythagorean Theorem.

5 minutes

15 minutes

## Looking for Common Errors

20 minutes

For our next activity, I give the class the Common Errors handout.  I ask them to work in their groups, reviewing and correcting the work in the first part of the document.

## Reflection and Summary of Errors

5 minutes

To conclude this lesson, I ask the students to summarize the errors that they saw on the Common Errors handout (and any others they might have come across when using the Pythagorean Theorem!) I list their observations on the board.

Their homework is the final problem on the handout. The Homework_Problem asks students to prove a hypothesis about opposite sides of a quadrilateral.