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If O is the center of the circle, what is the perimeter of t
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19 Sep 2018, 17:49
19 Sep 2018, 17:49
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If O is the center of the circle, what is the perimeter of the sector with central angle 72°?
(A) \(5 + 2\pi\)
(B) \(10 + 2\pi\)
(C) \(10 + 4\pi\)
(D) \(10 + 5\pi\)
(E) \(20 + 2\pi\)
Re: If O is the center of the circle, what is the perimeter of t
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20 Feb 2020, 14:04
20 Feb 2020, 14:04
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Re: If O is the center of the circle, what is the perimeter of t
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14 Feb 2021, 03:01
14 Feb 2021, 03:01
As the radius is 5, so both straight lines will be 5 + 5 = 10.
And the arc length = 2 * pi * r * (72 / 360) = 2 * pi * 5 * 1/5 = 2 * pi
So, perimeter is = 10 + 2 * pi
And the arc length = 2 * pi * r * (72 / 360) = 2 * pi * 5 * 1/5 = 2 * pi
So, perimeter is = 10 + 2 * pi
