Lesson: Angle Sum of a Triangle

In this lesson, we will learn how to find a missing angle in a triangle given the two other angles using the triangle angle sum theorem.

Video

13:25

Q1:

In triangle , we have and . What is ?

Q2:

The measures of the base angles of an isosceles triangle are and , and the measure of the vertex angle is . Find the values of and .

Q3:

Find the measure of .

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