Question

The button on Olivia's jacket has a radius of 4.2 millimeters. What is the button's circumference?

)) Use 3.14 for r. If necessary, round your answer to the nearest hundredth.

Answer 1

The formula for the circumference of a circle is C = 2πr, where r is the radius and π (pi) is approximately equal to 3.14.

In this case, the radius is given as 4.2 millimeters, so we can plug this into the formula to get:

C = 2πr

C = 2 × 3.14 × 4.2

C ≈ 26.39

Rounding to the nearest hundredth, the button's circumference is approximately 26.39 millimeters.