Mathematics
WAEC 1994
A circle has radius x cm. What is the area of a sector of the circle with angle 135°, leaving the answer in terms of x and π?
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A.
\( \frac{\pi x^2}{8} \)
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B.
\( \frac{3\pi x^2}{8} \)
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C.
\( \frac{5\pi x^2}{8} \)
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D.
\( \frac{3\pi x}{8} \)
Correct Answer: Option B
Explanation
A = θ 360 x πr2 = 135 360 x π x x2 = (3πx2)/8
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