
Area
of a circle 
3.1415 x r^{2} 
^{Where r = radius of
the circle} 

Circumference
of a circle 
3.1415 x d 
Where d = diameter of the
circle 

Volume
of a sphere 
^{4}/_{3} x
3.1415 x r^{3} 
^{Where r = radius of
the circle} 

Area
of a sphere 
4 x 3.1415 x r^{2} 
^{Where r = radius of
the circle} 

Volume
of a cylinder / pipe 
3.1415 x r^{2} x h 
^{Where r = radius of
the circle} 
h = height of cylinder /
pipe 

Volume
of a cone 
^{1}/_{3} x
3.1415 x r^{2} x h 
^{Where r = radius of
the circle} 
h = height of cone 

Area
of a cone 
3.1415 x (r x s) + (3.1415
x r^{2}) 
^{Where r = radius of
the circle} 
s = length of side of cone 

Area
of a triangle 
( w x h ) / 2 
Where w = width 
h = height 

Area
of a parallelogram 
h x l 
Where h = height 
l = length 

Volume
of a box 
w x l x h 
Where w = width 
h = height 
l = length 

Area
of a box 
2 x [(w x l ) + ( l x h) +
(h x w)] 
Where w = width 
h = height 
l = length 

Area
of a trapezoid 
h x ((L1 + L2)/2) 
Where h = height 
L1 and L2 = top and bottom
lengths 

Volume
of a tank 
[(A1 + A2)/2] x h 
Where h = height 
A1 and A2 = area of top and
bottom of tank 