In most of the competitive examinations, questions have been asked from Area and Perimeter. Basic formulas for calculation of Area and Perimeter of 2-Dimensional and 3-Dimensional figures have been given in this post.
| Figure | Perimeter | Area | Nomenclature |
| Triangle | a+b+c | (bh)/2 | b= base h= altitude a,b,c= side of triangles |
| Parallelogram | 2(a+b) | ah | a= side b= side adjacent to a h= distance between the parallel sides |
| Rectangle | 2(a+b) | ab | a= length b= breadth |
| Square | 4a | a2 d2/2 | a= side d= diagonal |
| Rhombus | 4a | (d1d2)/2 | a= side d1 and d2= Diagonals |
| Trapezium | sum of 4 sides | h(a+b)/2 | a,b= parallel sides h= distance between parallel sides |
| Circle | 2πr | πr2 | r= radius of circle π= 22/7 or 3.1416 |
| Semicircle | πr+2r | (πr2)/2 | r= radius of circle π= 22/7 or 3.1416 |
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