Question

If the diameter of a circle is an inch, which expression best describes the circumference, in inches?

Answer 1

The circumference of the circle is:

C = π inches or C = 3.14 inches

Explanation:

Given

Diameter of circle = d = 1 inch

To determine

circumference of the circle in inches

As

d = 2r

substituting d = 1 to determine r

1 = 2r

r = 1/2

Using the formula to determine the circumference of the circle

C = 2πr

substituting r = 1/2 in the equation

C = 2π×1/2

C = π inches

or

C = 3.14 inches

Therefore, the circumference of the circle is:

C = π inches or C = 3.14 inches