It's half of the distance across the circle.
The full distance is called the Diameter. To get the radius of a circle when you have the diameter, just simply divide it by two.
Diameter= 6
6/2=3
Radius= 3.
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If you mean the radius of a circle then it is half of the circle's diameter
radius is half of a circle. when u make a line from the middle of the circle to the edge would be the radius:]
Radius of curvature divided by tube diameter. To get the radius of curvature, imaging the bend in the tube is a segment of a circle, the radius of curvature is the radius of that circle.
If you mean: x^2 + y^2 = 64 then the radius of the circle is 8
The radius of a semi-circle is the same as the radius of the circle that was cut in half. The radius of a circle is the distance from the center of the circle to any point on the circle. That's the same as 1/2 of the diameter. It's easy to measure it on a semi-circle, because you don't even need to determine where the center is. The diameter is just the length of the flat side, and the radius is half of that.