What can symmetry tell us about triangles? After looking at four examples, learners will come to realize that lines of symmetry are different for equilateral, isosceles, and scalene triangles. Use this guided practice activity as an introduction to classifying triangles based on their side lengths.

Concepts

symmetry, triangle classification, triangles

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Additional Tags

classifying triangles, symmetrical shapes, asymmetrical shapes, math

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Pros

• Includes examples of equilateral, isosceles, and scalene triangles
• Triangles are labeled with side lengths to facilitate their classification

Cons

• Triangles are a little small if you plan on cutting them out for students to fold

Common Core

4.G.A.3 MP7