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Mathematics 9 Online
OpenStudy (anonymous):

The diameter of a rectangular room is 20 feet. The room is four feet longer than it is wide. How wide is the room?

OpenStudy (valpey):

I had to look this up because this phrasing is unfamiliar to me, but apparently the diameter of a rectangle is the length of its diagonal. I'd use the Pythagorean Theorum knowing that B = A+4 and C = 20.

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