Answer:
39
Step-by-step explanation:
For question number one
DBE has the measure x - 12
It is part of a 90 degree angle so to solve it we can use an equation.
2x - 12 = 90
2x = 102
x = 51
sub in the value to get 39.
Number two has a vertical angle so it has the same value as number one; 39
Number 3 is a 90 degree angle
