Question

Find the area of a circle with radius 5 cm.Use the value 3.14 for n, and do not round your answer.Be sure to include the correct unit in your answer.

Answer 1

We use the formula of the area of a circle

$A=\pi\times r^2$

where r is the radious, then replace the values

$\begin{gathered} A=(3.14)\times(5)^2 \\ A=3.14\times25 \\ A=78.5 \end{gathered}$

total area of the circle is 78.5 square centimeter