To find the area of a quadrilateral, multiply the length and width of the figure. The product will give you the area of the figure.
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A quadrilateral has 4 sides and 1 face which is its surface area.
The formula is bXh or base times height. if for instance you had a quadrilateral with a base that is 2 inches in length and is 3 inches high its area would be 6in2 .
You can calculate the area of any quadrilateral by dividing it into two triangles and summing their areas. A triangle's area is found by multiplying the base by the half of the height (when height measured perpendicular to the base)
It is 36 cm2
It is not possible to determine the area of a quadrilateral given only the length of its four sides.