diameter = 2rarea = pi*r^2
Circumference = pi*diameter or 2*pi*radius
double the radius
The question is in really bad english, but I'm guessing your meant: 'How do I work out the diameter using pi?' Diameter= Radius2 You don't need to use Pi to work out the diameter. Unless you have a question that doesn't show you the radius. Then you do Area divided by Pi which equals the Diameter.
Divide the circumference by 3.14159265 (3.14 for rough approximation) to find the diameter of a circle.
diameter = 2rarea = pi*r^2
Circumference = pi*diameter or 2*pi*radius
double the radius
The hot work ratio is the area ratio of the cast diameter and the pre-machined finished diameter.
The question is in really bad english, but I'm guessing your meant: 'How do I work out the diameter using pi?' Diameter= Radius2 You don't need to use Pi to work out the diameter. Unless you have a question that doesn't show you the radius. Then you do Area divided by Pi which equals the Diameter.
Divide the circumference by 3.14159265 (3.14 for rough approximation) to find the diameter of a circle.
It is the ratio of the circumference (C) and the diameter (D) of a circle. Using pi and the diameter of a circle, you can work out the circumference.
circumference = pi*100mm
The answer will depend on what information you have: radius, area, diameter.
The value of pi = circumference/diameter
Divide the cirumference by 3.14
EDIT: To find the diameter, using the circumference - you divide the circumference by the value of Pi - Snakester1962 (Supervisor)