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My question is this, I have a piece of glass that we call a rake, but is really just in the shape of a right angle. The measurement from inside the building, called the daylite measurement, is 37 1/8" at the base, 73 5/8" for the heigth, and the hypotenuse is 82 1/2".

In order to turn the daylite measurement into a glass size, 1" needs to be added to the measurement (basically draw a triangle outside the original that is 1/2" bigger all the way around).

What is the best and easiest way to calculate this problem? I read several posts on sin and cos, but could not put it all together (not to mention it has been 15 years since I took trig...).

Thanks in advance for your help.