The quickest way would be to actually measure it!
Another way is to find how high/wide the ball is. This has to be done very accurately. Yoy could use parallel wooden boards (be careful not to squash the ball!
The multiply the width/height of the ball by 3.14159265 (Pi).
The formula is Pi x d (diameter) = circumference. A ball that is 30 cms in diameter will have a circumference of 94.248 cms.
There is no circumference of a cone, but, we only do the circumference of the circle. the formula for the circle is pi times D. D= Diameter
Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
circumference=r2pi
Oh, dude, math time! So, the formula for finding the diameter of a circle from the circumference is dividing the circumference by π (pi). In this case, 49 divided by π is approximately 15.57 centimeters. So, the diameter of the circle is around 15.57 centimeters. Easy peasy, right?
C = pi d By algebraic rearrangement d = C / pi
There is no circumference of a cone, but, we only do the circumference of the circle. the formula for the circle is pi times D. D= Diameter
Circumference of a circle = (pi) x (diameter)
diameter times 3.14159
Divide the circumference by 2*pi because 2*pi*radius = circumference
2r+pi r
PI times the DIAMETER
3.14 to the 2 power
The formula for the circumference of a circle is pi * diameter or (2 radius.)
It is the formula for finding the circumference of a circle which is the same as 2*pi*radius
4*pi*r2. because surface area is equal to circumference of circle.
Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
Circumference = 2 x pi x radius