Question

The diagram below shows the radius of the circular opening of a drinking cup.

Which of the following is closest to the circumference of the opening in centimeters?

Answer 1

25 cm

Explanation:

`C=2\pi r` where r is the radius of the circle

Plug in the given radius (4 cm)

`C=2\pi (4)\\C=8\pi\\C=25`

Therefore, the circumference of the opening is approximately 25 cm.

I hope this helps!