value of pi
3.14
circumference of a circle
C = Pi x diameteror C = Pi x 2 x Radius
Area of a rectangle
A = length x width
Area of a circle
A = Pi x R^2
Area of a triangle
A = 1/2 x base x height
Volume of a cylinder
V = Pi x R^2 x height
Volume of a cube
V = length x width x height