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09-01-2004, 07:40 PM
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#1 |
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Member (10 bit)
Join Date: Nov 2001
Location: West Virginia, USA
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easy trigonmetry problem
Hey everyone,
I have a slight problem mostly because one of my teachers isn't explaining it well...and I am just really dumb  I would appreciate if someone could explain exactly how this works :A television antenna is to be erected and held by guy wires. If the guy wires are 15 feet from the base of the antenna and the antenna is 10 feet high, what is the exact length of each guy wire? I really appreciate this. |
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09-01-2004, 08:02 PM
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#2 |
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Member (6 bit)
Join Date: Apr 2004
Location: NoR~CaL
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see attachment:
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09-01-2004, 08:05 PM
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#3 |
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Member (10 bit)
Join Date: Nov 2001
Location: West Virginia, USA
Posts: 695
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Yeah I got that far, I am just trying to figure out what the answer is, because it isn't 325, I don't think the root of 325 is the answer either.
Last edited by Sauron; 09-01-2004 at 08:37 PM. |
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09-01-2004, 08:38 PM
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#4 |
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Lest we forget
Join Date: Jun 2003
Location: Ontario, Canada
Posts: 1,870
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you got it right.
I just did a tones of this not long ago. A^2+B^2 =C^2 10^2+15^2=C^2 100 + 225 =325 C= ^2 root of 325 C=18.02 18 seems like a good answer, i might be wrong though, math isint my strong point. |
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09-01-2004, 09:15 PM
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#5 |
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Served with Pride
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Join Date: Apr 2003
Location: near the left coast of Michigan
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Been a few years since I had math classes but my memory says that's not trig. More like Plane Geometry. And the problem involves the Pythagorean Theorem. (which is exactly what Ghost has described)
http://www.cut-the-knot.org/pythagoras/index.shtml |
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09-01-2004, 10:07 PM
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#6 |
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Member (10 bit)
Join Date: Nov 2001
Location: West Virginia, USA
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Well, I hope its right...but my teacher calls it Trig, and its being taught out of a Trig book....shrugs, maybe its just review, but from what I know about Trig, its mostly triangles.
Thanks all, James |
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09-01-2004, 10:10 PM
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#7 |
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Member (12 bit)
Join Date: Aug 2004
Location: NYC, NY
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i think its basic trig mabye ur teacher is teaching you the fundamentals
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09-01-2004, 10:51 PM
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#8 |
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Member (8 bit)
Join Date: Aug 2003
Location: SoCal
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You could do a very long method using trig; getting angle values from the A and B sides of the triangle and inverse tangent, and then use law of sine or the law of cosine.... I think. Anyhow, it would all probably simplify back to the pythagorean theorem anyway.
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