Question 1041738
 *[illustration fr12.JPG].
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{{{A+B+X=180}}}
{{{A=35}}}
{{{X=90}}}
{{{35+B+90=180}}}
{{{B=55}}}
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{{{Y=90}}}
In order to calculate C, you have to make an assumption that was not given in the problem. The assumption is that triangles ABX and YCZ are mirror images of each other.
Then,
{{{C=B=55}}}
and also since they are similar triangles,
{{{D=C=55}}}
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b) So the first cable is 115.
THe second would be {{{115+32=147}}}.
The third cable would be {{{147+32=179}}}
All together it takes  4 of each cable to make the bridge so,
{{{L=4(115+147+179)}}}
{{{L=4(441)}}}
{{{L=1323}}}{{{km}}}