Engineering Board Exam Reviewer · Circles: Arcs and Angles · hard
A circular sector of radius 10 cm has an area of 50 cm2. Find its perimeter in cm.
- 20
- 25
- 30
- 35
Answer
C. 30
Solution
A= 12r2 =50 =1 rad. The arc is r =10 cm, so the perimeter is 10+10+10=30 cm.
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