Suppose the diameter of a circle is / color{green}{10}10 start color green, 10, end color green. what is its radius

The diameter of the circle is given to be 10 units. We are to find the radius.

The diameter is always the twice of radius. If d represents the diameter and r represents the radius, we can write:

d = 2r

or

r = d/2

For d=10,

r = 10/2 = 5 units

So, the radius of the circle will be 5 units