Circumference of a circle = 2*pi*radius or pi*diameter.
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circumference of a circle = 2*pi*radius or pi*diameter
Circumference of a circle = 2*pi*radius or pi*diameter
It would be the radious squared times pi R2xpi (3.14) * * * * * The text is wrong, the formula is correct. The circumfernce is 2*π*radius or, since the diameter is double the radius, circumference = π*d π is an irrational number which is approximately 3.14
Divide the circumference by pi (~3.14) to get the diameter.
Circumference = 2Пr = 2 x 3.14159 x 3.5/2 = 10.995565