Question

A circle has a radius of 3 inches and an area of 9π square inches.

Which expression should be used to find the circumference of this circle?

Responses

9π/3

9π/3⋅2

9π/2⋅3

9π⋅(3) to the power of 2

Answer 1

Answer:Circumference = 2πr

where "r" represents the radius of the circle.

In this case, the radius of the circle is given as 3 inches. So, to find the circumference, we substitute the value of "r" into the formula:

Circumference = 2π(3)

Simplifying this expression, we get:

Circumference = 6π

Therefore, the correct expression to find the circumference of this circle is 6π.

Explanation:

Answer 2

Area of a circle = π*r 2 (Pi * radius squared) Next, we plug the given radius value into the formula. So if r=3, the area of the circle is π*3 2 = π*9. This is usually written with the "pi" after the Arabic number: 9π ("nine pi")

To find the radius of a circle with a circumference of 10 centimeters, you have to do the following: Divide the circumference by π, or 3.14 for an estimation.