# 9.7: Triangle Classification by Angles

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**At Grade**Created by: CK-12
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Acute Triangle

Acute Triangle

An acute triangle has three angles that each measure less than 90 degrees.Equilateral Triangle

Equilateral Triangle

An equilateral triangle is a triangle in which all three sides are the same length.Obtuse Triangle

Obtuse Triangle

An obtuse triangle is a triangle with one angle that is greater than 90 degrees.Right Triangle

Right Triangle

A right triangle is a triangle with one 90 degree angle.Triangle

Triangle

A triangle is a polygon with three sides and three angles.### Image Attributions

## Description

Learn how to classify different types of triangles by their angles.

## Learning Objectives

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## Difficulty Level:

At Grade## Tags:

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## Date Created:

Oct 29, 2012## Last Modified:

Oct 20, 2015## Vocabulary

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