Classifying triangles
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Intros
Lessons
- What are the basic characteristics of triangle shapes/polygons?
- How to classify triangles by their side length
- How to classify triangles by their angles
- Review on the six classifications for triangles
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Examples
Lessons
- Classifying triangles by side lengths
Classify the triangle by its side lengths. Is it scalene, isosceles, or equilateral? - Classifying triangles by angles
Classify the triangle by its angles. Is it acute, right, or obtuse? - Classifying triangles by more than one type
Classify the triangle by BOTH its side length and angles. (scalene, isosceles, or equilateral; acute, right or obtuse) - Word Problems: Classifying Triangles
Use this figure to answer the following questions:
- If a triangle's side lengths are: 2cm, 1cm, and 1.73cm how would you classify it and why?
- If this triangle is a right triangle, what types of angles does it have?
- Is it possible for this triangle to have an obtuse angle? Why or why not?
- If this right triangle has one angle that is 30°, give the measures of all three of the angles.
