Question

Find the area of each circle. Round to the nearest tenth.Only 1 and 2

Answer 1

Step-by-step explanation

The area a circle can be expressed in two forms;

`\begin{gathered} \text{Area}=\pi r^2 \\ \text{Area}=\pi((d)/(2))^2 \\ \end{gathered}`

Where r and d are the radius and the diameter of the circle.

Therefore;

For number 1, r =21 yards,

`\text{Area}=\pi*21^2=1385.4\text{square yards}`

Answer: 1385.4 square yards

For number 2, d= 0.4 km

`\text{Area}=\pi*((0.4)/(2))^2=\pi*0.2^2=0.1km^2`

Answer:0.1 square kilometres