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Write and simplify the exact expression for the area of the sidewalk.
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Write and simplify the exact expression for the area of the sidewalk.
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Mar 20, 2020
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Write and simplify the exact expression for the area of the sidewalk.
Mathematics
middle-school
Dmitry Ginzburg
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Dmitry Ginzburg
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given area of small circle= πr^²= π×9×9= 81π
and area of greater circle= πr^²= π×11×11= 121π
now area of the sidewalk= area of greater circle (-) area of small circle= 121π-81π=40π
40×22/7=125.714m^²
ChrisEenberg
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Mar 24, 2020
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ChrisEenberg
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