The area of a quadrilateral is the amount of space that is contained within the 2-dimensional polygon. It is calculated by the equation
t + b
2
x h
t represents the width of the top of the quadrilateral
b represents the width of the bottom of the quadrilateral
h represents the height
For many quadrilaterals, like squares, rectangles, rhombuses, the width of the top and bottom are the same, so in that case, there is no need to find the average. For example, if you are determining the area of a trapezoid and the height is 3, the base is 6, and the top is 4
Calculate the average of the top and the bottom by adding 6 and 4 and dividing by 2, which is 5
Multiply that by the height of 3, which means the area is 15
