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10 August, 16:34

In a circle, a 90° sector has area 36π ft2. What is the radius of the circle?

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  1. 10 August, 17:40
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    A 90° sector takes up 90/360 = 1/4 of a full circle so if the area of this sector is 36pi square feet, then the total area of the circle is 4*36pi = 144pi square feet
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