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Area of a trapezoid: 0.5*(sum of its parallel sides)*height
acute, obuse, or right angles
quadilateral (four sides) of any lengths, as long as two of them are parallell.
A perpendicular edge is a side of a plane shape that is at right angles (90 degrees) to another edge.
1/16/2013 10:06 pm New York State I'm 5 grade Dear Friend, the math i just learn about shape , but i can explore the answer for you . The different between parallelogram and trapezoid is the parallelogram had 2 pair of parallel ,but trapezoid had 1 pair parallel. It different is it had different how many pair are they. The Parallelogram and trapezoid are the same because it also a parallel line in there shape From, Angelina Nguyen