Classifying Triangles
5th GradeMath20 min
Learning Objective
I can classify triangles by their sides and angles.
Lesson Flow
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Guided Notes
Key concepts students will learn:
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Triangles are polygons that always have 3 sides and 3 angles; the word ‘triangle’ means 3 angles.
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Triangles can be classified by their sides and by their angles.
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If all three sides of a triangle are the same length, it is an equilateral triangle; if only two sides are equal, it is an isosceles triangle; and if no sides are equal, it is a scalene triangle.
Practice
3 questions • Multiple choice & Short answer
Exit Ticket
“Draw an example of each of the following triangles: acute isosceles, obtuse scalene, and right scalene. Label each triangle with its type.”
Teacher Guide
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- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
