Line m is parallel to line n. The measure of angle 3 is (2x− 3)°. The measure of angle 6 is (x + 39)°. What is the measure of angle 3?

Are they corresponding angles? If so, 2x-3=x+39. Are they supplementary angles? If so, 2x-3+x+39=180. Are they complementary angles? If so, 2x-3+x+39=90.

To find the measure of angle 3, we need to use the fact that line m is parallel to line n. When two lines are parallel, the corresponding angles are equal. In this case, angle 3 corresponds to angle 6.

According to the question, the measure of angle 6 is (x + 39)°. So, angle 3 is also (x + 39)°.

Therefore, the measure of angle 3 is (x + 39)°.