First you write the formula for the area of a trapezium, either from memory or
by looking it up. Then you substitute the lengths of the sides in your trapezium
for each of the appropriate terms in the formula.
Oh, all right:
Area = 1/2 (height) x (length of base-1 plus length of base-2).
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The six quadrilaterals are a square, a rectangle, a rhombus, a parallelogram, a trapizuim, and a kite.
To work out the area of a composite shape, you will have to divide it into smaller figures.
Area = 1/2*(sum of the parallel sides)*height
Length multiplied by width equals the area of a square or rectangle A=LxW Your answer will be in units squared.
Another dimension is needed to work out the surface area of the roof.