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General Formula  

 

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Circle Formula
Triangle Formula
Sphere Formula
Cylinder Formula
Cone Formula

Legend

R = Radius
D = Diameter
C = Circumference
Pi = 3.142
A = Area
S = Surface Area
V = Volume
B = Base
H = Height

 

 

Circle Formula
Area = C2 or Pi x D2 or C x R or
Pi x R2
4 x Pi 4 2
Circumference = 2 x Pi x R or Pi x D

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Triangle Formula
Area = B x H x 0.5

  (Height from the top point of triangle perpendicular to the base)

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Sphere Formula
Volume = 4/3 x Pi x R3

 
Surface Area = 4 x Pi x R2

 

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Cylinder Formula
Volume = Pi x R2 x H

(Radius of base, height of cylinder wall)
Surface Area = (2 x Pi x R2) + (2 x Pi x R x H)

 

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Cone Formula
Volume = 1/3 x Pi x R2 x H

(Radius of base, height from the top point of cone perpendicular to the base)
Surface Area =

 

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Author: Bill Wood 
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