How to match existing conduit bends

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A guy I was working with showed me a formula like square this number, then square this number, then add them, then find the square root of that number. Sound familar? The guy lost me, I don't know what measurements he's talking about
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In algebraic terms, a? + b? = c? where c is the hypotenuse while a and b are the legs of the triangle.

may not be the best method, but it will work.
 
sandking said:
Really? It's an angle "finder". You place this on the existing angle to see what it is via the digital display, then bend your new one to the same angle.
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Looks nice. I haven't seen that type before. I have a magnetic protractor I've had for a few years. 1st one did well until the needle started sticking & giving false angles.

I see that a few of the pocket levels are now adding 15 and 30 degree angles. I always thought they should do that, as we use those angles a lot. 45 is good, but not used as much. Main time I've used a 45 is either a sharp offset or more often when I need a wide radius 90 to clear a beam or such. Bend a 45, then another behind it.
 
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