Question

Complete this assessment to review what you've learned. It will not count toward your grade.
Item 1
Use the Triangle Angle Sum Theorem to find the measure of the third angle if the first and second angle measure 63° and 40°

Answer 1

To find the measure of the third angle, we add the measures of the first and second angle and subtract the result from 180° (since the sum of the three angles in a triangle is always 180°).

So, the measure of the third angle is:

180° - (63° + 40°)

180° - 103°

The measure of the third angle is 77°.