there is a problem in my algebra book I can't solve for the life of me. The book is: College Algebra, Robert Blitzer. The problem: A trapezoid with bases of 14m and 16m is drawn inside a square (there is a diagram in the book illustrating this problem with the sides of the trapezoid not touching the sides of the square) . The area inside the square but outside of the trapezoid is 675 square meters. What is the height of the trapezoid.

How is this problem solved. It seems to me that there is not enough information given. I can't even begin to solve this. There are two variables. How can this be set up so that it can be solved in terms of just one variable, namely the height of the trapezoid?

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