# Determination of Unknown Angles Using Law of Cosines

## Find unknown angle given lengths of all 3 sides

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## Determination of Unknown Angles Using Law of Cosines

by CK-12 //at grade
Find an unknown angle of a side side side triangle using the Law of Cosines
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## Using the Law of Cosines with SSS (to find an angle)

by CK-12 //at grade
This lesson covers using the Law of Cosines to find an angle in a triangle.
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## Law of Cosines with SSS

by Chris Campbell //at grade
This lesson covers using the Law of Cosines to find an angle in a triangle.
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• Video

## Example: Determine the Measure of an Angle of a Triangle Given the Length of Three Sides

by CK-12 //at grade
Gives an example of using the Law of Cosines to find the measure of the largest angle of a triangle, given the lengths of all three sides.
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• Study Guide

## Oblique Triangles

by Edgar Magana //at grade
This study guide covers the concept about oblique triangles and how to solve them using the law of cosines.
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