Question

The circumference of the circle in the above figure is 128 ft. What is the length of AB?

A. 16 ft
B. 105.5 ft
C. 22.5 ft
D. 45 ft

Answer 1

Set up a proportion: Central Angle/360= arc length/ circumference where the central angle= 45 and circumference= 128 ft. After you cross multiply, you should find that the answer is 16ft which is A.