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#1 2007-02-01 05:09:16

Neha
Member
Registered: 2006-10-11
Posts: 173

Help Please

Find y, A, and B

       \                                           120 dg /
_____\_____________________________/___>____
          \                                         29/3 /
  8        \                                              /  (3A)dg
----------------------------------------------------->------
              \                                          /
                \                                       /
                 \                                     /
      15         \                              y   /
                    \                                /
                     \                              /
-------------------------------------------------->-------
                        \                        /
                         \                      /  (5B)dg


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#2 2007-02-01 05:24:05

luca-deltodesco
Member
Registered: 2006-05-05
Posts: 1,470

Re: Help Please

the diagram is a bit confusing, any chance you could draw it out on the computer and upload the picture?


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#3 2007-02-01 06:45:39

Neha
Member
Registered: 2006-10-11
Posts: 173

Re: Help Please

exam1problem1ll4.jpg


Find y, A, and B


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#4 2007-02-01 07:20:44

luca-deltodesco
Member
Registered: 2006-05-05
Posts: 1,470

Re: Help Please

since all the 3 lines coming down a parallel, the ratio between the left edges 8 and 15 will be the same as 29/3 and y

so:

since 3A and 5B are angles between the same line, and lines that are paralell, 5B angle can be translated all up the line, so that 5B + 3A = 180. the also means, that the angle opposite 120 = 5B, so B = 24. then 3A = 180-24 = 156, A = 53


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