Engineering Board Exam Reviewer · Circles: Arcs and Angles · medium
An arc of a circle measures 72° and has a length of 8 cm. Find the radius of the circle.
- 6.37 cm
- 5.09 cm
- 7.64 cm
- 3.18 cm
Answer
A. 6.37 cm
Solution
s=r 8=r≤ft(72×π/180 )=r(1.2566) r 6.37 cm.
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