Two angles of a triangle measure 12º and 40°. What is the measure of the third angle of the triangle? A. 38 B. 48 C. 128 D. 308°

Question

asked Jul 9, 2021 164k views

1 Answer

QualiT · Answer 1 · 2021-07-13T20:56:30+0000

The sum of the interior angles in each triangle is 180 degrees.

so :

12 + 40 + x = 180

52 + x = 180

x = 180 - 52

x = 128

so the third angle of the triangle is 128 degrees which means C is correct.