Question

How do you calculate the area of a circle with a radius of \[5cm\]?

Answer 1

Hint: In the given question, we have been given to calculate the area of a circle. We have been given the measure of the radius of the circle. To solve this question, we need to know the formula of the area of a circle and that is the only thing we need to know.

Formula used:
We are going to use the formula of area of a circle,
\[A = \pi {r^2}\]

Complete step-by-step answer:
We are given a circle with the radius equal to \[5cm\]. We have to find its area.
We just use the formula of area of a circle, which is,
\[A = \pi {r^2}\]
Hence,
\[A = \pi {\left( 5 \right)^2} = 3.14 \times {\left( 5 \right)^2} = 3.14 \times 25 = 78.5c{m^2}\]
Thus, the area of the circle is \[78.5c{m^2}\].

Note: In the given question, we were given a shape whose area was to be calculated. The only way to calculate it is by knowing the formula of the area of the given shape. So, it is really important that we know the formulae and where, when and how to use them so that we can get the correct result.