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- The sector of a circle has radius of 21 cm and central angle 135o. Find its perimeter?
Question 1:
The sector of a circle has radius of 21 cm and central angle 135o. Find its perimeter? A. 92.5 cm
B. 94.5 cm
C. 93.5 cm
D. 91.5 cm
Feedback Perimeter of the sector = length of the arc + 2(radius)
= (135/360 * 2 * 22/7 * 21) + 2(21)
= 49.5 + 42 = 91.5 cm
= (135/360 * 2 * 22/7 * 21) + 2(21)
= 49.5 + 42 = 91.5 cm
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