Question

the diameter of a circle is 12 cm. find its area in terms of $pi$. answer attempt 1 out of 2 $a = \text{____} \text{ cm}^2$

Explanation:

Step1: Find the radius

The radius $r$ of a circle is half of the diameter $d$. Given $d = 12$ cm, so $r=\frac{d}{2}=\frac{12}{2}=6$ cm.

Step2: Calculate the area

The area formula of a circle is $A=\pi r^{2}$. Substitute $r = 6$ cm into the formula, we get $A=\pi\times6^{2}=36\pi$ $cm^{2}$.

Answer:

$36\pi$