Understanding the meaning of radius

radius

/'reɪdiəs/

noun
the length of a line segment between the center and circumference of a circle or sphere
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Similar:

r

type of:
length

part of:
diameter diam
noun
support consisting of a radial member of a wheel joining the hub to the rim
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Similar:

spoke wheel spoke

type of:
support

part of:
wagon wheel bicycle wheel cartwheel
noun
a circular region whose area is indicated by the length of its radius
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"they located it within a radius of 2 miles"

type of:
region part
noun
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
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type of:
straight line
noun
the outer and slightly shorter of the two bones of the human forearm
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type of:
arm bone

part of:
forearm

Explanation of radius

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