SOLUTION: a 20 foot long wire is used to support a television antenna. the wore is connected to the antenna 15 ft above the ground. how far away from the tower will the other end of the wire

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Question 426454: a 20 foot long wire is used to support a television antenna. the wore is connected to the antenna 15 ft above the ground. how far away from the tower will the other end of the wire be located

I'm so lost. I just don't know how to set it up. I tried it and got 13.228
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