Answer:
x = 10
Step-by-step explanation:
The arc size (100) is the same size as the central angle (<AOC)
The angle labeled 5x is 1/2 of the central angle.
Since the central angle = 100o the 5x angle = 50 degrees.
5x = 50 Divide by 5
5x/5 = 50/5
x = 10
