8 inches refer to 20.320041centimeters...and its half is the radius.that is10.160021
In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints are on the circle. The radius of a circle is the length of the line from the center to any point on its edge. Therefore the radius is 4 inches.
4 inches...radius is from center to edge. Diameter is all the way across.
You multiply pi times 8 = your radius
That is my homework and I need a answer please:( by the way I am not that smart o.k.
Twhee is right. the radius is half the diameter, so half of 8 is 4.