Mensuration (Area)

Useful Formulae

 These are some of the formulae you will be learning in the math class for calculating area.

Other surface areas

Shape Formula Description
Cube 6 x Length x Width A cube is made up of of six square surfaces with same area.
Cuboid (2 x Height x Width) + (2 x Height x Base) + (2 x Base x Width) Each pair of triangles have same area, total three pairs.
Cylinder (solid) 2Πr 2 + 2Πr x height of the cyclinder
Cone (solid) Πr 2 + Πrl l refers to slant height
Sphere 4Πr 2

r = radius

Surface Area

Shape Formula
Square l x w
Rectangle l x w
Triangle 1/2 x b x h
Parallelogram b x h
Trapezium 1/2 x (Base Length + Top Length) x h
Circle Πr 2

l = Length

w = Width

b = Base

h = Height

r = radius

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