Grade Levels: 6-8, 9-12

*Click to open and customize your own copy of the Similar Figures Lesson Plan.

This lesson accompanies the BrainPOP topic Similar Figures, and supports the standard of solving mathematical and real-world problems involving proportional relationships between similar triangles. Students demonstrate understanding through a variety of projects.

Step 1: ACTIVATE PRIOR KNOWLEDGE

Ask students:

  • What do you already know about finding a ratio?
  • How does a ratio relate to a proportion?

Step 2: BUILD KNOWLEDGE

  • Read the description on the Similar Figures topic page.
  • Play the Movie, pausing to check for understanding. 
  • Assign Related Reading. Have students read one of the following articles: “In Depth” or “Arts and Entertainment”. Partner them with someone who read a different article to share what they learned with each other.

Step 3: APPLY and ASSESS 

Students take the Similar Figures Quiz, applying essential literacy skills while demonstrating what they learned about this topic.

Step 4: DEEPEN and EXTEND

Students express what they learned about similar figures while practicing essential literacy skills with one or more of the following activities. Differentiate by assigning ones that meet individual student needs.

  • Make-a-Movie: Produce a tutorial that explains how to use ratios and proportions to determine if two figures are similar. 
  • Make-a-Map: Create a concept map identifying the steps to finding a shape’s proportions. 
  • Creative Coding: Code a learning game challenging players to sort figures by attributes, such as sides and angles.

More to Explore 

Sortify: Similar Figures: ​​Players sort triangles by attributes, such as sides and angles in this categorizing game.

Related BrainPOP Topics: Deepen understanding of geometry with these topics: Polygons, Types of Triangles, and Pythagorean Theorem.

Teacher Support Resources:

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