What is radius?

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A straight line joining the centre of a circle or sphere to any point on the circumference or surface usually denoted by symbol 'r'. D=2r
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The distance b/w centre of circle & any circumferencial point.
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Highly Qualified Tutor

Radius is the half od diameter.
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The distance from the center of the circle to any point on the circle is called the radius.
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Radius is the length from centre of a circle to its circumference.
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B.Com(Corporate Secretaryship) and M.B.A (Finance and HR) have strong knowledge in marketing too because of my role in Sharekhan.

Its a straight line from the center of a circle to the edge of circle.
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radius is half of diameter
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Hai Mounica, Consider a circle / Sphere () The distance from the center point to any point on the circle or sphere is denoted by RADIUS ( denoted as r ) .Twice the radius is known as diameter of the circle.
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Professional with diverse Industry Experience and Teaching Expert

'Radius' is a straight line which originates from center of the circle to its circumference. Where, Circumference=2pi*radius=pi*diameter.
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math magician

The distance from the center of a circle to any point on the edge of the circle.
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