Question

the area of the circle is 21 cm². what is the area of the red sector? area of red sector = cm²

Explanation:

Step1: Determine the fraction of the sector

The circle is divided into 3 equal parts, so the red sector is $\frac{1}{3}$ of the circle.

Step2: Calculate the area of the red sector

The area of the circle is $21\ cm^2$. To find the area of the red sector, multiply the area of the circle by the fraction of the sector. So, $21\times\frac{1}{3} = 7$.

Answer:

$7$