Question

4. If the diameter (across) is 30 cm, what is the measure of the radius? 30 cm Hint: The radius is 1/2 the diameter d=21.​

Answer 1

If the diameter is 30 cm, the radius is 15 cm

Explanation:

What is the diameter of a circle?

It's a straight line that runs from one side of the perimeter through the center to the other side of the perimeter.

The hint is exactly correct, the radius is a half of the diameter, or the diameter is 2 times the radius.

If the diameter is 30cm, the measure of the radius is 30 ÷ 2 ( = 15)