If the area of the circle is given by the formula- A - - r2- find the subject of the formula-

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If the area o...

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If the area of the circle is given by the formula, $A = π r^{2}$ , find the subject of the formula.

A

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r

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π

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Circle

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= π r^{2}

π r^{2}

Question 18

Fill in the blanks to make the statement true.

In the formula, area of circle $= π r^{2},$ the numerical constant of the expression $π r^{2}$ is ___

V = π (R^{2} - r^{2}) h

C

2 π

The perimeter of a circle having a radius $^{'} r^{'}$ units is given by $π r^{2}$ .

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