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14-05-2020
Mathematics

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the area of sector aob is 12.25 find the exact area o the shaded region

the area of sector aob is 1225 find the exact area o the shaded region class=

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Chelboy Chelboy

14-05-2020

Answer:B

Step-by-step explanation:

Φ=90

Radius=r=7

area of sector=12.25π

Area of triangle=0.5 x r x r x sinΦ

Area of triangle=0.5 x 7 x 7 x sin90

Area of triangle=0.5 x 7 x 7 x 1

Area of triangle=24.5

Area of shaded portion=area of sector - area of triangle

Area of shaded portion=12.25π - 24.5

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