Basic "TRIGONOMETRY" Question

[AGL4now]

What is the formula for calculating the long line (Diagonal) if one corner is 90 degrees...??? If the length (Height & Width) of two lines meeting at 90 degrees are both known.......what is the formula for calculating the third line.......???

Yes.......laying out footers.

[logman 49]

4-5-6 method?

[akriverunner]

A squared plus B squared = C squared


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[AGL4now]

So if I take a "KNOWN" less5, less6............????

4-5-6 method?

[akriverunner]

Are you looking to find the long side of a triangle and you know the other two lengths?


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[AGL4now]

NO.......If the footing is to be "X" long (a Known) and "Y" wide (also a known) and if all corners are to be "Right-angle" (90*) how does one calculate the corner to corner length.

[akriverunner]

Basic "TRIGONOMETRY" Question

The 3, 4, 5 method is used for checking square. Are you trying to square footings for a rectangle or square? Take each side you know and multiply by itself, add the two numbers together and find the square root of them. Answer will be the diagonal length


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[anchskier]

NO.......If the footing is to be "X" long (a Known) and "Y" wide (also a known) and if all corners are to be "Right-angle" (90*) how does one calculate the corner to corner length.

This is a right angle triangle. From your description, you are trying to find the long side (hypotenuse) of the triangle when you know the two shorter sides (X and Y). Essentially, you know the two measurements for the sides of the "L" and are trying to find the measurement that connects the two ends?

If so, the equation given above is correct. The square of one length + the square of the next length = the square of what you are looking for. So, (X x X) + (Y x Y) = (C x C). You are looking for C, so once you get the first part of the equation solved, just get the square root and you have your answer.

[colonel00]

Here you go:

http://www.algebra.com/calculators/g...ythagorean.mpl

[AGL4now]

So.....34 feet wide squared is 1,156

28 feet deep squared is 784

when added together equals 1930

Next question: what number when squared equals 1930......??? I miss my slide ruler.

Thanks for the help.

[DuckFreak]

43.93176527297759 roughly.

[colonel00]

Based on the link above, 44.05

Oh, it's 1940, not 1930

[anchskier]

So.....34 feet wide squared is 1,156

28 feet deep squared is 784

when added together equals 1930

Next question: what number when squared equals 1930......??? I miss my slide ruler.

Thanks for the help.

If you are using a computer to post here, you most likely have a calculator program built in. For windows computers, it is under the start-more programs-accessories-calculator. Just enter the number you are wondering about such as "1930" and then click on the square root button (the one that looks a lot like a check mark).

[Frostbitten]

So.....34 feet wide squared is 1,156

28 feet deep squared is 784

when added together equals 1930

Next question: what number when squared equals 1930......??? I miss my slide ruler.

Thanks for the help.

As colonel pointed out, 1156 + 784 = 1940....not 1930.

[AGL4now]

OK........So what number squared equals 1940.....???? Please

As colonel pointed out, 1156 + 784 = 1940....not 1930.