The radius, from the centre of a circle to it's edge.
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The diameter is the length across the middle of a circle. Half of the diameter is called the radius.
the radius is half the diameter. radius is half of 11. Which is 5.5.
The length of a radius of a circle is half of the diameter of the same circle. So, diameter is always twice the radius.
The radius is half the diameter.
The diameter of a circle is the length of the circle from one side to the other, going through the middle of the circle. The radius is the measurement of length from the middle of the circle to the perimeter of the circle. This is half of the diameter.