# Construction math

What is the area of a roof on a 30 foot by 40 foot house with 12" rake O.H. (Over Hang), 5/12 slope? Please show problem in detail.

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... denotes feet)

A 5/12 pitch means for every five units of length (feet, meters, etc.) measured in the horizontal direction, the roof will rise 12 of those same units. This is a right angled triangle with hypotenuse of 13 because 25+144=169=132

We do not need trig to solve this problem. We will use similar triangles, by ...