Math? If a circle has a diameter of 42in what is the radius
The radius is half the diameter.
To find the radius of a circle, you can use the formula:
Radius = Diameter / 2
In this case, the given diameter is 42 inches. So, you can simply divide the diameter by 2 to find the radius.
Radius = 42 inches / 2 = 21 inches
Therefore, the radius of a circle with a diameter of 42 inches is 21 inches.