The area of a circle is 16π cm2. what is the circle's circumference?
2π cm
4π cm
8π cm 1
6π cm

Step-by-step explanation:

Area of circle is given by :-

, where r is the radius.

Given : The area of a circle is

Then, we have

Since r cannot be negative , so r=4 cm

The circumference of a circle is given by :-

Hence, the circle's circumference = cm

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2