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# 5.3: Identify Accurate Drawings of Triangles

Difficulty Level: At Grade Created by: CK-12
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### Vocabulary Language: English

law of cosines

law of cosines

The law of cosines is a rule relating the sides of a triangle to the cosine of one of its angles. The law of cosines states that $c^2=a^2+b^2-2ab\cos C$, where $C$ is the angle across from side $c$.

## Date Created:

Sep 26, 2012

Feb 26, 2015
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