Question

If the area of a circle is

7.7 cm2, what is the
circumference of the
circle? (I need a step-by-step answer for further understanding please!!)

Answer 1

Since area =7.7

`area = (22)/(7) {(r)}^(2) \\ {(r)}^(2) = 2.45 \\ r = 1.57`

Then the circumference is

`c = 2pi* r \\ = 2 * 3.14 * 1.57 \\ = 9.859`