Using the Angles of a Triangle to my Advantage | Part 4

This video tutorial explains the triangle angle sum theorem, which states that the interior angles of a triangle add up to 180 degrees. The instructor demonstrates how to use this theorem to solve for unknown variables in three different examples. The first example involves solving for X with two known angles, the second example deals with unknown angles, and the third example introduces the exterior angle theorem. The video emphasizes the importance of understanding these concepts for solving problems in geometry and later math classes.

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