In the above figure m AOC=21 and m BOD=(2x+39) degree if AOC and BOD are vertical angles what is the value of x
Since AOC and BOD are vertical angles, they are congruent. Therefore, we have:
m AOC = m BOD
21 = 2x + 39
Subtracting 39 from both sides of the equation:
-18 = 2x
Dividing both sides by 2:
-9 = x
Therefore, the value of x is -9.