What is the area of a circle with a diameter of 15m?

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Answer 1 · 2015-09-30T11:56:09

Use the formula $A = π \cdot r^{2}$ $A=pi*r^2$

Area= $56.25 \cdot π$ $56.25*pi$ $m$ $m$ or $\frac{225}{4} \cdot π$ $225/4*pi$ $m$ $m$ or approximately $176.7$ $176.7$ $m$ $m$

The formula for the area of a circle is $A = π \cdot r^{2}$ $A=pi*r^2$ , where $A$ $A$ is the area and $r$ $r$ is the radius

The radius if half the diameter, so

$r = \frac{1}{2} \cdot d$ $r=1/2*d$

$r = \frac{1}{2} \cdot 15 m$ $r=1/2*15m$

$r = 7.5 m$ $r=7.5m$

Therefore,

$A = π \cdot r^{2}$ $A=pi*r^2$

$A = π \cdot {(7.5)}^{2}$ $A=pi*(7.5)^2$

$A = 56.25 \cdot π$ $A=56.25*pi$ $m$ $m$ or $A \approx 176.7$ $A~~176.7$ $m$ $m$ (correct to 1 decimal place)