Question

What is the area of the circle if CY= 5.4 mm

Answer 1

Given

The diameter is given XY = 5.4 mm.

Explanation

To determine the area of circle,

Use the area of circle formula.

$A=\pi(r)^2$

Find the radius, using the relation between diameter and radius.

$d=2r$

Substitute the diameter in the relation.

$\begin{gathered} 5.4=2r \\ r=2.7mm \end{gathered}$

Now substitute the radius in the area of circle formula.

$\begin{gathered} A=(2.7)^2\pi \\ A=7.29\pi mm^2 \end{gathered}$

Answer

Hence the area of circle is

$7.29\pi mm^2$

The correct option is C.