Find the length or area. I need help with 11 pls

AmitSri asked Mar 27, 2023

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AmitSri asked Mar 27, 2023

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17 votes

Given the formula of a portion of the circle

$A=\pi *r^2*(\theta)/(360)$

We are given that

$A=20\pi ft^2$
$\theta=72$

thus

$20\pi=\pi *r^2*(72)/(360)$

Solving for r

then the radius of the circle is 10ft

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