Which set of angle measures can be used to contruct a triangle?

A. 45°,60°,75°

B. 45°,65°,75°

C. 50°,45°,75°

D. 50°,65°,75°

The correct answer is A

Sum of all three angles of a triangle must be equal 180.

Let's add all the the angles of the given choices to get the correct answer.

A: 45+60+75=180

Sum of 45°,60°, and 75° is 180°. So, A is the correct answer.