Suppose the diameter of a circle is / color{green}{4}4start color green, 4, end color green. what is its radius?

The formula for calculating the radius of a circle given its diameter is radius equals diameter divided by two. Using the information given of a circle with a diameter of four, the radius is four divided by two, or two.

By definition we have the relationship between the diameter of a circle and its radius is as follows:

r = d / 2

where

r: radio

d: diameter

Since the diameter of the circle is 4, then the radius will be given by

r = (4) / 2 = 2

answer

the radius of the circle is 2 units.