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  • Basic "TRIGONOMETRY" Question

    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.
    ALASKA is a "HARD COUNTRY for OLDMEN". (But if you live it wide'ass open, balls'to the wall, the pedal floored, full throttle, it is a delightful place, to finally just sit-back and savor those memories while sipping Tequila).

  • #2
    4-5-6 method?

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    • #3
      A squared plus B squared = C squared


      Sent from my iPhone using Tapatalk

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      • #4
        So if I take a "KNOWN" less5, less6............????

        Originally posted by logman 49 View Post
        4-5-6 method?
        ALASKA is a "HARD COUNTRY for OLDMEN". (But if you live it wide'ass open, balls'to the wall, the pedal floored, full throttle, it is a delightful place, to finally just sit-back and savor those memories while sipping Tequila).

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        • #5
          Are you looking to find the long side of a triangle and you know the other two lengths?


          Sent from my iPhone using Tapatalk

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          • #6
            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.
            ALASKA is a "HARD COUNTRY for OLDMEN". (But if you live it wide'ass open, balls'to the wall, the pedal floored, full throttle, it is a delightful place, to finally just sit-back and savor those memories while sipping Tequila).

            Comment


            • #7
              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


              Sent from my iPhone using Tapatalk
              Last edited by akriverunner; 06-06-2014, 11:23. Reason: add

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              • #8
                Originally posted by AGL4now View Post
                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.

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                • #9
                  Here you go:

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

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                  • #10
                    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.
                    ALASKA is a "HARD COUNTRY for OLDMEN". (But if you live it wide'ass open, balls'to the wall, the pedal floored, full throttle, it is a delightful place, to finally just sit-back and savor those memories while sipping Tequila).

                    Comment


                    • #11
                      43.93176527297759 roughly.

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                      • #12
                        Based on the link above, 44.05

                        Oh, it's 1940, not 1930

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                        • #13
                          Originally posted by AGL4now View Post
                          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).

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                          • #14
                            Originally posted by AGL4now View Post
                            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.

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                            • #15
                              OK........So what number squared equals 1940.....???? Please


                              Originally posted by Frostbitten View Post
                              As colonel pointed out, 1156 + 784 = 1940....not 1930.
                              ALASKA is a "HARD COUNTRY for OLDMEN". (But if you live it wide'ass open, balls'to the wall, the pedal floored, full throttle, it is a delightful place, to finally just sit-back and savor those memories while sipping Tequila).

                              Comment

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