Question

the diameter of a circle is a line which joint two points on the circle and also passes through the centre the circle. express the diameter of the circle (d) in the terms of its radius (r)​

Answer 1

ANSWER

Since C is center of circle, CA,CB,CP are radius.

∴CA=CB=CP=r

Now,AB is diameter of circle.

AB=AC+BC

d=r+r=2r

Answer 2

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Since C is center of circle, CA,CB,CP are radius.

∴CA=CB=CP=r

Now,AB is diameter of circle.

AB=AC+BC

d=r+r=2r

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