Question

say formulas in quadrilateral and area and perimeter​

Answer 1

The formula for an irregular quadrilateral -- which is a polygon that has four sides that are of unequal length -- is the same as that of a trapezoid. The formula is a + b + c+ d = perimeter. For example, suppose that a quadrilateral has sides with lengths of 1, 5, 3 and 4 inches

 The formula is 4 x s = perimeter
The formula is 2(l + w) = perimeter
The formula is  a + b + c + d = perimeter. 

To find the area of a rectangle, you need two measurements: the width, or base (the longer side of the rectangle), and the length, or height (the shorter side of the rectangle). Then, just multiply them together to get the area.

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