What makes an equilateral triangle equilateral? It turns out it's much more than just the side lengths! Learners analyze four different triangles to determine the best equilateral triangle. They create a formula that they later use to justify their rankings.

Concepts

equilateral triangles, triangles, area, area of triangles, perimeter of triangles, perimeter, angles

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Additional Tags

math

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Instructional Ideas

• Ask pupils to create a chart comparing the dimensions, angles, perimeter, and area of each triangle
• Incorporate as a performance task to assess area and perimeters of triangles

Classroom Considerations

• Ensure pupils are familiar with the terms area, perimeter, angles, and equilateral

Pros

• Includes a teacher guide to help plan for the lesson
• Allows instructors to download videos for use offline

Cons

• None

Common Core

HSG-GPE.B.4 MP3 MP4