Question

find the area of the circle round to the nearest tenth use 3.14 for pi do not include the units with your answer dammit or equals 15.6 cm

Answer 1

Given a circle with radius, r, the area, A, of the circle is given by

$\begin{gathered} A=\pi r^2 \\ \text{taking }\pi\approx3.14,\text{ we have} \\ A=3.14r^2 \end{gathered}$

Also,

$\text{the radius of a circle = }\frac{\text{ the diameter}}{2}$

Therefore,

$\text{ the radius = }\frac{15.6}{2}=7.8\operatorname{cm}$

then,

r = 7.8cm

Therefore,

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