Suppose the radius of a circle is three units what is the circumference

or units

Step-by-step explanation:

The circumference of a circle can be found using the formula , where is the circle's circumference and is the circle's radius. We know that and that we are solving for . Therefore:

Since is approximately , units. Hope this helps!

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: