Question

Given a circle with a radius of four what is the circumference?

Answer 1

Given, radius r = 4 units

We know that, Circumference of a radius

= $2\pi \: r$
= 2 × 22/7 × 4
= 25.142 units

Answer 2

Answer:
8 π inches

Explanation:
The formula for circumference is diameter *
π

The radius of a circle is always exactly half of the circles diameter.
Therefore, the diameter will be 8 inches
Multiply the diameter, 8 by
π to determine the circumference.