Answer:
In mathematics, a real number is a value of a continuous quantity that can represent a distance along a line (or alternatively, a quantity that can be represented as an infinite decimal expansion).
Well, if it's a square it will have 4 sides. You have a total area of 480 square feet. You take 480/4 and that is 120. Thus you will need 120 feet of molding.
Well according to my calculations the image isn't exactly correct, but:
n(unknownangle) = 180 - 125 = 55
360 = 120 + 55 + 90 + x
x = 95
180 - 95 = 85
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x = 95
y = 85