The radius of a circle is the distance from the centre to the rim. The diameter is the distance fron rim to rim passing through the centre point. It therefore follows that the radius is half the diameter
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the radius of a circle is half the diameter, so half of 1.8 is .9. The radius is .9km.
One half the diameter = the radius Algebraically expressed as d/2 = r or d = 2r
Half of the diameter. Radius = 1/2 Diameter
That it is half the diameter of a circle
Length of a radius is always half the diameter of a circle. This means that the circle has a radius of 2cm.