Perimeter and area
The perimeter and area formulas for various plane figures are pithily tabulated below.
The plane figures are:
Trapezium, Parallelogram, Rhombus, Rectangle, Square.
The formulas for perimeter and area are given in the table below for quick reference without solving any problems on them.
Quadrilateral/ Plane Figure |
Perimeter |
Area |
Trapezium
|
AB + BC + CD + AD |
|
Parallelogram
|
AB + BC + CD + AD |
base × height |
Rhombus |
AB + BC + CD + AD = 4a |
½ ×(product of diagonals) |
Rectangle |
2 × ( l + b) |
l × b |
Square |
4a |
a2 or d2/2 |
