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# Angle Measures in Given Triangles

## Use equations to find missing angle measures given the sum of 180 degrees.

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Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
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• Video

## Animation of the Sum of the Interior Angles of a Triangle

by CK-12 //basic
Illustrates that the sum of interior angles of a triangle is 180 degrees.
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