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 | = p×p, p is side. |
| Rectangle |  = l×b |
| Rhombus | = \(\frac{d1 \times d2}{2}\), d1 and d2 are diagonals. |
| Parallelogram | = b×h |
| Trapezium | = \(\frac{[(a+b)h]}{2}\) |
| Isosceles Trapezium | = \(\frac{[(a+b)h]}{2}\) |
| Kite | \(\frac{d1 \times d2}{2}\), d1 and d2 are diagonals. |
Solved Examples of Formulas of Quadrilateral
Q: The area of a parallelogram 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 parallelogram=b×h
36 =b(6)
b=36 / 6 = 6
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