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The diagonals of a trapezoid are 18 and 20. They are perpendicular with each other. Find the area of the trapeze.

I need help, can't dind a solution.

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Arthur D. | Effective Mathematics TutorEffective Mathematics Tutor
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You can use the formula A=(1/2)(d1*d2) where the d's are the diagonals to find the area of the trapezoid only if the diagonals are perpendicular to each other. Seeing that they are perpendicular in the problem, you can use this formula.
A=(1/2)(18*20)
A=(1/2)(360)
A=180 square units