Question

The diameter of a circle is 18 cm. What is its area in terms of π.

Answer 1

The area of the circle would be 81π.

Answer 2

Answer:

Area, $A=(81\pi )\ cm^2$

Step-by-step explanation:

Given that,

The diameter of the circle, d = 18 cm

The radius of a circle is half of its diameter, r = 9 cm

The formula to find the area of a circle is given by :

$A=\pi r^2$

When r = 9 cm

$A=\pi (9\ cm)^2$

$A=(81\pi )\ cm^2$

So, the area of the circle is $(81\pi )\ cm^2$. Hence, this is the required solution.