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The area of the trapezoid at right is . What is the height, ? (Hint: The formula for the area of a trapezoid can be written as , where and are the lengths of the bases.) Show all work.

A trapezoid with horizontal bases labeled 6 cm and 10 cm.  A right triangle is created by a line segment h , drawn from the lower left vertex, to the upper base, at right angles.

What is the formula for the area of a trapezoid?
Use that to solve for .