Quadrilateral Formulas

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 Formulas for different quadrilateral types.

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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