Quadrilaterals are the four-sided polygons. By this, it means that the no. of sides, vertices and angles they have is four each. In Quadrilaterals, the internal angles total up to 3600 There are 7 types of different Quadrilateral.

 Quadrilateral Type Quadrilateral Formula Square Area of Square= p×p, p is side. Rectangle Area of Rectangle = l×b Rhombus Area of rhombus= b×h Area of rhombus= $\frac{d1 x d2}{2}$, d1 and d2 are diagonals. Parallelogram Area of parallelogram= b×h Trapezium Area of Trapezium= $\frac{[(a+b)h]}{2}$ Isosceles Trapezium Area of Trapezium= $\frac{[(a+b)h]}{2}$ Kite $\frac{d1 x d2}{2}$, d1 and d2 are diagonals.

Solved Examples of Formulas of Quadrilateral

Q: The area of a rhombus is 36 and the height is 6. Find the base.

Sol: Given, area=36, and h=6

To find: base b

Formula: b×h

Area of rhombus=b×h

36 =b(6)

b=36 / 6 = 6

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Practise This Question

Select the option which best suits the given descriptions for P, Q, R and S.
P - A simple tool used for removing weeds
Q - A tool which is used for ploughing and is used with a tractor
R - A tool which is used for sowing and removing weeds
S - A simple tool used for cutting of crops