The circumference of a sphere is:
The surface area of a sphere is:
The volume of a sphere is:
A Few Basic Definitions Applied
Given:
= pi = The ratio of the circumference of a circle to its diameter = Circumference / Diameter
= 3.14159265358979324 ...Regardless of the size (scale) of the circle, the ratio (
) remains constant.
1 radian = That angle at which the length of the corresponding arc of a circle is equal to its radius.
The relationship between degrees and radians is:
Radians / Degrees =
/ 180
So, 1 radian = 180/
= 57.2957795130823° = 206264.806247096"