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Find the missing angle on a triangle

This math skill teaches how to find the missing angle in a triangle by using the principle that the sum of the angles in a triangle always equals 180 degrees. Subtract the sum of the known angles from 180 to find the missing angle.

Skill Practice

Find the missing angle on a triangle

Test your understanding of find the missing angle on a triangle by practicing it! Work through the below exercises to use it in practice.