## Loading...

Prove It (Part 2)

# Prove It (Part 2)

Unit 9: Similar and Right Triangles

Lesson 3 of 8

Lesson 3 of 8

## 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.

Standards:

Subject(s):

Math, similar triangles, Geometry, Similarity and Congruence, triangle (Determining Measurements), Pythagorean Theorem, similar right triangles, right triangle, proof, altitude to the hypotenuse, hypothesis, 10th grade

*45 minutes*

3

#### Looking for Common Errors

*20 min*

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.

*expand content*

4

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.

*expand content*

##### Similar Lessons

###### Applying Triangle Congruence

Geometry » Triangles and Congruence

Big Idea:
Students learn how proving triangles congruent can be used as part of a larger strategy in a proof.

*Favorites(5)*

*Resources(18)*

Ault, CO

Environment: Rural

Environment: Rural

###### Time for Triangles

Geometry » Tremendous Triangles

Big Idea:
Students will measure, cut and measure again to learn and prove key properties of triangles

*Favorites(4)*

*Resources(28)*

Saratoga Springs, NY

Environment: Suburban

Environment: Suburban

###### Relationships between Angles and Sides of a Triangle

Geometry » Proofs about Triangles

Big Idea:
This lesson gives students the opportunity to discover the relationship between the sides and angles of a triangle through a hands-on activity.

*Favorites(1)*

*Resources(16)*

New York, NY

Environment: Urban

Environment: Urban

Scroll Up

- LESSON 1: Introduction to Similar Right Triangles
- LESSON 2: Prove It (Part 1)
- LESSON 3: Prove It (Part 2)
- LESSON 4: Using the Pythagorean Theorem
- LESSON 5: Special Right Triangles
- LESSON 6: 30, 60, 90 Triangles
- LESSON 7: Isosceles Right Triangles
- LESSON 8: Special Right Triangles Puzzle Activity

Scroll Down