Please help! All the help means the world to me!

First, we know that there are 5 poles. Next, we know that the equation [tex]\frac{n(n-1)}{2}[/tex] represents the amount of strings needed if we have n number of poles. Therefore, we can plug 5 poles into n (as n represents the amount of poles) to get [tex]\frac{5(5-1)}{2}[/tex] =[tex]\frac{5*4}{2}[/tex] = 10 as our answer.
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