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The diameter of a circle is a line whic...

The diameter of a circle is a line which joins two points on the circle and also passes through the centre of the circle. (In the adjoining figure (Fig 11.12) AB is a diameter of the circle; C is its centre.) Express the diameter of the circle (d) in terms of its radius (r).

Text Solution

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We know that diameter is twice the length of the radius of the circle.
Given that C is the centre of
a circle, CP is the radius denoted by r and AB is a
diameter denoted by dSo, Diameter =` 2 xx` Radius
=` 2 xx r`= 2r
Therefore, 2r is the diameter of the circle in terms of its radius
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