Question

V.4 Area and circumference of

The area of a circle is 12.56 square kilometers. What is the circle's circumference
Use 3.14 for л.
Submit
kilometers

Answer 1

12.56 km

Explanation:

The circumference of a circle is given by

`c = 2\pi \: r`

let's find the radius

the area of a circle is given by

`a = \pi \: {r}^(2)`

12.56 = 3.14 r²

r² = 12.56/3.14

r² = 4

r = √4

r = 2

let's find the circumference

C = 2πr

C = 2 × 3.14 × 2

C = 12.56 km

I hope this helps