02GF74
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| posted on 17/12/08 at 11:08 AM |
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trigonometry problem
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DarrenW
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| posted on 17/12/08 at 12:10 PM |
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5cm
3,4,5 triangle is a well known way of creating a right angle.
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DarrenW
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| posted on 17/12/08 at 12:13 PM |
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Mathmatically,
hypotenuse (a) = square root of b squared plus c squared.
Square root of 9 + 16 = 5
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cd.thomson
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| posted on 17/12/08 at 12:19 PM |
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clearly explained.
Also if this is for GCSE maths or equivalent then this is taught as one of the standard ratios you should just know without having to worry and panic
about the working out.
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mistergrumpy
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| posted on 17/12/08 at 12:24 PM |
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I don't think he was asking for the answer  That's from some of the "true exam answers given by teenagers" list somewhere on
teh web.
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cd.thomson
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| posted on 17/12/08 at 12:26 PM |
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durrr, seems I had a logic and humour bypass on this one.
I'll get my coat.
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DarrenW
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| posted on 17/12/08 at 12:27 PM |
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In a practical sense knowing a 3, 4, 5 triangle can save lots of hassle. Good for checking if walls are square (ie when fitting kitchen worktops) or
for laying out paving or floor tiles.
Strangely the same rule works out if you need a bigger triangle - for instance 0.3m x 0.4m x 0.5m or if you need a big imperial one such as 6' x
8' x 10' etc.
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DarrenW
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| posted on 17/12/08 at 12:29 PM |
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quote:
Originally posted by mistergrumpy
I don't think he was asking for the answer That's from some of the "true exam answers given by teenagers" list somewhere on
teh web.
Bugger - looks like you are right
I thought it strange he would raise that question
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