Question

ex #1 find the area of a circle with a radius of 6 cm
6 cm
a = 3.14 x 6 x 6
a = 113.04 cm²
ex #2 find the area of a circle with a diameter of 11 m
11 m
a = 3.14 x 5.5 x 5.5
a = 94.985 m²
practice 1. find the area of each circle below. sh
a)
2.4 cm
find the area of a circle with:

Explanation:

Step1: Find the radius

Given diameter $d = 2.4$ cm, radius $r=\frac{d}{2}=\frac{2.4}{2}=1.2$ cm.

Step2: Use the area - formula

The formula for the area of a circle is $A=\pi r^{2}$. Substitute $r = 1.2$ cm and $\pi=3.14$. So $A = 3.14\times1.2\times1.2$.
$A=3.14\times1.44 = 4.5216$ $cm^{2}$

Answer:

$4.5216$ $cm^{2}$