In the formula- area of circle - -r-2- the numerical constant of the expression -r-2 is - - Maths Q-A

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Circumference of a Circle

In the formul...

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In the formula, area of circle $= {πr}^{2}$ , the numerical constant of the expression ${πr}^{2}$ is ________.

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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 ___

r_{1}

r_{2}

r

r = r_{1} + r_{2}

{r_{1}}^{2} + {r_{2}}^{2} = r^{2}

r_{1} + r_{2} < r

{r_{1}}^{2} + {r_{2}}^{2} < r^{2}

If the sum of the areas of two circles with radii $R_{1}$ and $R_{2}$ is equal to the area of a circle of radius R then

(a) $R_{1} + R_{2} = R$

(b) $R_{1} + R_{2} > R$

(d) $R_{1}^{2} + R_{2}^{2} = R^{2}$

R_{1} + R_{2} = R

R_{1} + R_{2} < R

R_{1}^{2} + R_{2}^{2} < R^{2}

R_{1}^{2} + R_{2}^{2} = R^{2}

If the sum of the circumferences of two circles with radii $R_{1} a n d R_{2}$ is equal to the circumference of a circle of radius R then

(a) $R_{1} + R_{2} = R$ (b) $R_{1} + R_{2} > R$ (c) $R_{1} + R_{2} < R$ (d) none of these

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