# Classifying triangles

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##### Intros
###### Lessons
1. Introduction to Classifying triangles:
2. What are the basic characteristics of triangle shapes/polygons?
3. How to classify triangles by their side length
4. How to classify triangles by their angles
5. Review on the six classifications for triangles
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##### Examples
###### Lessons
1. Classifying triangles by side lengths
Classify the triangle by its side lengths. Is it scalene, isosceles, or equilateral?

2. Classifying triangles by angles
Classify the triangle by its angles. Is it acute, right, or obtuse?

3. 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)

4. Word Problems: Classifying Triangles
Use this figure to answer the following questions:
1. If a triangle's side lengths are: 2cm, 1cm, and 1.73cm how would you classify it and why?
2. If this triangle is a right triangle, what types of angles does it have?
3. Is it possible for this triangle to have an obtuse angle? Why or why not?
4. If this right triangle has one angle that is 30°, give the measures of all three of the angles.
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