Sphere Circumference, Surface Area and VolumeThis simple program computes the basic parameters
of a sphere given its radius (R) in any linear units.
The circumference of a sphere is:
The surface area of a sphere is:
The volume of a sphere is:
A Few Basic Definitions Applied
= 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"
© 2015 - Jay Tanner - PHP Science Labs - v1.5