# Telegraph poles

The bases of two adjacent telegraph poles have a height difference of 10.5 m. How long do the wires connect the two poles if the slope is 39° 30´?

Correct result:

x =  16.507 m

#### Solution:

$h=10.5 \ \text{m} \ \\ A=39 + 30/60=\dfrac{ 79 }{ 2 }=39.5 \ ^\circ \ \\ \ \\ \sin A=h:x \ \\ x=h/\sin A ^\circ =h/\sin 39.5^\circ \ =10.5/\sin 39.5^\circ \ =10.5/0.636078=16.507 \ \text{m}$ Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

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