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प्रश्न
The area of a sector of a circle with radius r, making an angle of x° at the centre is ______.
विकल्प
`x/180xx2pi"r"`
`x/180xxpi"r"^2`
`x/360xx2pi"r"`
`x/360xxpi"r"^2`
MCQ
रिक्त स्थान भरें
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उत्तर
The area of a sector of a circle with radius r, making an angle of x° at the centre is `underlinebb(x/360xxpi"r"^2)`.
Explanation:
A sector with central angle x° is `x/360` of the whole circle.
The whole circle’s area is πr2, so the sector area = `x/360 xx πr^2`.
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