Applying the exterior angle sum theorem to solve for the missing angle ex

The video tutorial explains the use of the extra angles theorem and the interior angle theorem to solve geometry problems. It highlights the relationship between exterior angles and the sum of opposing interior angles, providing a simpler method for calculating angles. The tutorial emphasizes the efficiency of using equations over traditional subtraction methods.

Explain the process of finding the measure of angle 1 using the given degrees.

What is the final measure of angle 1 after calculations?