a rectangular has a width of 12 and a diagonal of 20 cm find the length of the rectangle.
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Answer:
12^2 + L^2 = 20^2
L = 16
It's just a 3-4-5 triangle scaled up by a factor of 4.
12^2 + L^2 = 20^2
144 + L^2 = 400
L^2 = 256
L = 16
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