The figure below shows a circle centre O and AOB is a sector of the circle and angle AOB = 72⁰ as shown. Given that the...

The figure below shows a circle centre O and AOB is a sector of the circle and angle AOB = 72⁰ as shown. Given that the area of a sector AOB is 5pi cm², find the radius of the circle and hence calculate the area of the shaded part.

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sharon kalunda answered the question on August 9, 2019 at 14:12

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