Pi, approximately 3.14159265
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Circumference = Diameter multiplied by Pi Diameter = Circumference divided by pi Radius = Diameter divided by 2.
The diameter will be the circumference of 78 divided by pi
Circumference is pi times diameter. Diameter is circumference divided by pi. Diameter is twice the radius. Radius is half the diameter.
About 157.64mm. The Diameter equals the Circumference divided by Pi (about 3.14).
Yes.