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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