Calculate the perimeter of a sector of a circle of raduis 9cm and angle 36o.
-
A.
18cm -
B.
(18 + (frac{9pi}{5}))cm -
C.
(9 + (frac{9pi}{5}))cm -
D.
(frac{9pi}{5})cm
Correct Answer: Option B
Explanation
Perimeter = 2r + (frac{theta}{360}) x 2(pi)r
2(9) + (frac{36}{360}) x 2 x (pi) x 9 = 18 + (frac{9pi}{5})
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