# 6.6: Understanding the Angle Measures of Triangles

Difficulty Level:

**At Grade**Created by: CK-12Estimated6 minsto complete

%

Progress

**Practice**Triangle Sum Theorem

MEMORY METER

This indicates how strong in your memory this concept is

Practice

Progress

Estimated6 minsto complete

%

Estimated6 minsto complete

%

Practice Now

MEMORY METER

This indicates how strong in your memory this concept is

Turn In

### Notes/Highlights Having trouble? Report an issue.

Color | Highlighted Text | Notes | |
---|---|---|---|

Show More |

Acute Triangle

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

Congruent figures are identical in size, shape and measure.Equilateral Triangle

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

An isosceles triangle is a triangle in which exactly two sides are the same length.Obtuse Triangle

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

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

A scalene triangle is a triangle in which all three sides are different lengths.Triangle Sum Theorem

The Triangle Sum Theorem states that the three interior angles of any triangle add up to 180 degrees.### Image Attributions

Show
Hide
Details

Description

Learn to understand the angle measures of triangles.

Learning Objectives

None

Related Materials

Difficulty Level:

At Grade
Subjects:

## Concept Nodes:

Grades:

Date Created:

Jan 23, 2013
Last Modified:

Aug 11, 2016
Vocabulary

None

Files can only be attached to the latest version of Modality