Circumference of a Circle - Circle Geometry

If temperature is kept constant, the volume of a given mass of gas is inversely proportional to the pressure which is exerted upon it.

Circumference = 2Circumference of a Circle r = Circle Geometryd = 3.14159 d

 Circumference of a Circle - Circle Geometry 
Area = Circumference of a Circle - Circle Geometryr2 =
= .78539d2