Triangle Angle Sum Theorem Practice Complete this assessment to review what you've learned. It will not count toward your grade. 1 of 51 of 5 Items Question
1: If one angle of a triangle measures 45 degrees, and the second angle measures 60 degrees, what is the measure of the third angle?
a) 75 degrees
b) 90 degrees
c) 105 degrees
d) 120 degrees
Correct answer: a) 75 degrees
Explanation: The sum of the angles in a triangle is always 180 degrees. Therefore, to find the measure of the third angle, you can subtract the sum of the first two angles from 180 degrees: 180 - (45 + 60) = 75 degrees.