∠a and ∠b are vertical angles with m∠a=x and m∠b=3x−60 . what is m∠a ? enter your answer in the box.

we know that

Vertical angles are congruent angles opposite each other where two lines cross

so

in this problem

m∠A=m∠B

so

substitute the values

therefore

the answer is

The measure of angle A is

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.