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For all circles , however, large or small The diameter is twice the radius.

Diameter(d) equals(=) radius(r) plus(+) radius(r).

d = r + r

d = 2r .

NB The diameter is a straight line from the circumference to the centre , and then out to the opposite sided circumference.

It is NOT an angled line centred on the central point.

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lenpollock

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16 centimeters.

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Wiki User

15y ago
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Q: If a circle has a radius of 8 centimeters what is the diameter?
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What is the equation of a circle whose diameter's end points are at 2 -3 and 8 7?

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