Mensuration (Area)
Surface Area
| Shape | Formula |
| Square | Length x Width |
| Rectangle | Length x Width |
| Triangle | 1/2 x Base x Height |
| Parallelogram | Base x Height |
| Trapezium | 1/2 x (Base Length + Top Length) x Height |
| Circle | Πr 2 |
r = radius
Other surface areas
| Shape | Formula | Description |
| Cube | 6 x Length x Width | It consists of six square surfaces with same area. |
| Cuboid | (2 x Height x Width) + (2 x Height x Base) + (2 x Base x Width) | Three pairs of rectangle where each pair of triangles have same area. |
| Cylinder (solid) | 2Πr 2 + 2Πr x height of the cyclinder | |
| Cone (solid) | Πr 2 + Πrl | l is the slant height |
| Sphere | 4Πr 2 |
r = radius
Mensuration – Area (Questions)
- How long is the side of a cube if the surface area is 600cm2?
- What is the surface area of a sphere if the radius is 0.7cm?
Mensuration – Area (Answer)
- 10cm
- 6.16cm2
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I am Dr Loo, a PhD holder with 8 years of teaching experience on secondary school and tertiary level specialize on mathematics and statistics. In addition, I also received teaching training under tertiary setting. Furthermore, I have published 5 research papers on international peer reviewed journals. If you are currently looking for secondary mathematics tuition or A-level math tuition in Singapore, I do provide O-level Math Tutoring & JC Math Tutoring (H1 Math Tuition Class & H2 Math Tuition Class).
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