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    #46


    22.99 degree

    All you need is the angle between the adjacent side and hypotenuse of a triangle.
    Last edited by Hardware; 06-30-2020, 10:47 AM.

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      #47
      Originally posted by Hardware View Post
      Don't have 2 sides in the original problem

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        #48
        Originally posted by JustinJ View Post
        Don't have 2 sides in the original problem
        Yep. And you can't do the a squared plus b squared equals c squared if you only have one side.

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          #49



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            #50
            ^^ There you go. C = 8.94" theta = 22.66°

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              #51
              Originally posted by JustinJ View Post
              I believe you have a parallelogram illustrated.
              A rhombus has equal sides.

              Looks like some rafter math could be involved. A carpenter framing square sure sounds handy, if you know how to use one.

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                #52
                In your first calculation, where did your c2 go?

                Originally posted by Deerslayersh View Post



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                  #53
                  Got 'er did fellas.
                  Attached Files

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                    #54
                    Not sure what you're asking. There are 3 equations and 3 unknowns.

                    1. 8.25^2 + (4-a)^2 = c^2
                    2. 0.5^2 + b^2 = a^2
                    3. 0.5/8.25 = b/4

                    Solve the third equation for b (b = .2424)
                    Solve the second equation for "a" after plugging in "b" (a = .5557)
                    Solve the first equations for "c" after blogging in "a" (c = 8.94)

                    For the angle it's just the tangent inverse of (4-a)/8.25. You could have solved for c using the sin or cosineif you wanted, too.

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                      #55
                      Burt Reynolds died.


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                        #56
                        After reading this thread it became extremely apparently why I chose my profession. Just flat ain't smart enough for much else.

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                          #57
                          I didn't follow how you got step 3.

                          Originally posted by Deerslayersh View Post
                          Not sure what you're asking. There are 3 equations and 3 unknowns.

                          1. 8.25^2 + (4-a)^2 = c^2
                          2. 0.5^2 + b^2 = a^2
                          3. 0.5/8.25 = b/4

                          Solve the third equation for b (b = .2424)
                          Solve the second equation for "a" after plugging in "b" (a = .5557)
                          Solve the first equations for "c" after blogging in "a" (c = 8.94)

                          For the angle it's just the tangent inverse of (4-a)/8.25. You could have solved for c using the sin or cosineif you wanted, too.

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                            #58
                            Originally posted by jb5001 View Post
                            I didn't follow how you got step 3.
                            c^2 = 8.25^2 + (4-0.5557)^2
                            c = sqrt(8.25^2 + (4-0.5557)^2).
                            c = sqrt(79.926) = 8.94

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                              #59
                              Originally posted by hpdrifter View Post
                              I believe you have a parallelogram illustrated.
                              A rhombus has equal sides.

                              Looks like some rafter math could be involved. A carpenter framing square sure sounds handy, if you know how to use one.
                              You're right its a parallelogram. Not sure where I got rhombus from

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                                #60
                                Math (geometry problem)

                                Originally posted by Deerslayersh View Post
                                Not sure what you're asking. There are 3 equations and 3 unknowns.

                                1. 8.25^2 + (4-a)^2 = c^2
                                2. 0.5^2 + b^2 = a^2
                                3. 0.5/8.25 = b/4

                                Solve the third equation for b (b = .2424)
                                Solve the second equation for "a" after plugging in "b" (a = .5557)
                                Solve the first equations for "c" after blogging in "a" (c = 8.94)

                                For the angle it's just the tangent inverse of (4-a)/8.25. You could have solved for c using the sin or cosineif you wanted, too.

                                Your equation 3 is wrong. The two triangles are not similar.

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