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 600cm^{2}?
- What is the surface area of a sphere if the radius is 0.7cm?
Mensuration – Area (Answer)
- 10cm
- 6.16cm^{2}
About Dr Loo - O-level & JC H2 math tutor
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 currenlty looking for mathematics 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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