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Mensuration (Area)

Question

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

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

Having difficulty in understanding the mensuration?

Mensuration is one of the important fundamental topics to be learnt in most of the secondary school math syllabus, you are encourage to look for your secondary math teacher to clarify about this topic if you have problems in understanding it. Alternatively, you can find a suitable secondary math tuition class for yourself.

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