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
           =
      2(b +h)

 

base × height
b × h

Rhombus

 

AB + BC + CD + AD = 4a
a is side

 

½ ×(product of diagonals)

Rectangle

 

2 × ( l + b)

 

l × b

Square

 

4a
a is side

 

a2 or d2/2
d is diagonal length

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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