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MathsIsFun
2005-07-27 07:40:37

The bigger triangle is a 3:4:5 triangle, but it could be sitting at any angle relative to the (0.2 and x) triangle, so x could be large or small.

Is it part of a wider problem? Perhaps there is a clue there.

GurraTedden
2005-07-27 01:19:34

But it's a mechanics problem.

mathsyperson
2005-07-27 00:06:52

Well, if you don't have the hypotenuse, then it can't be solved as it is, because to use trigonometry you need 3 pieces of information and you've only got 1 side and 1 angle.
So, yes, you need to attack it another way. If you're still stuck then post the whole problem on here.

GurraTedden
2005-07-26 23:44:18

That's the problem, man! The answer should be 0.75, but I can't see it. I need to know if I can solve it,
or if I have to find another way of attacking the original problem. I would also like to read it like you did,
but unfortunately I have drawn it correct. The side 0.3 is not the hyp. of the little triangle. I have gone
forth and back on if there is some kind of connection between the ratios, or (what you call the relationship
between the sides that's not the hyp.)

mathsyperson
2005-07-26 23:17:51

If so, x²=0.3²-0.2²
x²=0.05
x=√0.05≈0.223

GurraTedden
2005-07-26 23:09:02

Hi, check this out:

http://engman.bravehost.com/mechanics/side.JPG

I've been sitting with it for 2 hours now, it just makes me crazy. I mean, it is
a possibility that the mechanical problem that this trig. is derived from is ment
to be solved in an other way, but i wouldn't bet my money on that.