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OAB is a sector of a circle as shown below.

Calculate the area of the shaded region.
Give your answer in mm² to 1 d.p.
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OAB is a sector of a circle as shown below. Calculate the area of the shaded region-example-1

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Answer:

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Explanation:

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OAB is a sector of a circle as shown below. Calculate the area of the shaded region-example-1
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