Classifying Triangles
6th Grade•45 minutes
Learning Objective
I can classify triangles by their angles and sides.
Key Concepts
Triangles are polygons that always have 3 sides and 3 angles.
Triangles can be classified by their sides (equilateral, isosceles, and scalene) and by their angles (right, acute, and obtuse).
The three angle measurements of any triangle, when combined, will always add up to 180 degrees.
Practice Questions
This lesson includes 9 practice questions to reinforce learning.
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1. What are the two main ways to classify triangles?
2. Explain the difference between an acute, right, and obtuse triangle.
3. A triangle has angles measuring 30 degrees and 60 degrees. What is the measure of the third angle, and what type of triangle is it based on its angles?
...and 6 more questions
Educational Video
Math Antics - Triangles
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