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Author quick maths question
Jake
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Registered: 24th Jan 05
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18th Feb 10 at 17:54   View User's Profile U2U Member Reply With Quote

How would I work out the diagonal measurement(Red line) on the picture i made below(measurements are in meters)? Would make my life so much easier if i knew this!



cheers
AlexSXI
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Registered: 10th Jan 08
Location: Colchester, Essex
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18th Feb 10 at 17:55   View User's Profile U2U Member Reply With Quote

Isn't that just 5m

In the 3,4,5 method??

I could be very wrong though.
Nath
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Registered: 3rd Apr 02
Location: MK
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18th Feb 10 at 17:56   View User's Profile U2U Member Reply With Quote

I did this at school but have forgotten
Chrissy
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Registered: 28th Jan 06
Location: Sunny Glasgow Drives: Astra J
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18th Feb 10 at 17:56   View Garage View User's Profile U2U Member Reply With Quote

Use Pythagoras


>>>> Chris <<<<

Jake
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18th Feb 10 at 17:56   View User's Profile U2U Member Reply With Quote

ok. that was a simple measurement. How about if it was 3.5x5.2m
Kurt
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18th Feb 10 at 17:57   View User's Profile U2U Member Reply With Quote

http://www.qub.ac.uk/keyskills/WN/Numeracytriangles.html#saright

quote:


In a right-angled triangle, what is the length of side c if a = 3 and b = 4?

Given a2 + b2 = c2

so 32 + 42 = c2

9 + 16 = c2

25 = c2

c=Ö25

So c = 5




[Edited on 18-02-2010 by Kurt]
JonnyJ
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18th Feb 10 at 17:57   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by will_doyle
I put a ruler against the screen and it is 11.5cm

Chrissy
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Registered: 28th Jan 06
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18th Feb 10 at 17:57   View Garage View User's Profile U2U Member Reply With Quote

its (c squared)=(a squared)+(b squared)

Then find the route of c squared..


>>>> Chris <<<<

Dom
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18th Feb 10 at 17:58   View User's Profile U2U Member Reply With Quote

SquareRoot(x²+y²)
It's basic pythagoras

edit - in your example, you would square root 3.5²+5.2m²

[Edited on 18-02-2010 by Dom]
adiohead
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18th Feb 10 at 17:59   View User's Profile U2U Member Reply With Quote

c = 5

a2 + b2 = c2


GOD DAMN BEATEN TO IT BY LOADS OF OTHERS :@

[Edited on 18-02-2010 by adiohead]
Jake
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18th Feb 10 at 18:02   View User's Profile U2U Member Reply With Quote

cheers lads. Probably save us 10minutes of fucking about with that equation!

Colin
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18th Feb 10 at 18:07   View User's Profile U2U Member Reply With Quote

Its just a 3-4-5 triangle.....you learn that in Primary 3 or something, there's no calculation to do!!
Jake
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18th Feb 10 at 18:10   View User's Profile U2U Member Reply With Quote

i was looking for a calculation that i can use with any measurement. It's sorted
Hammer
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18th Feb 10 at 18:10   View User's Profile U2U Member Reply With Quote

The 3, 4, 5 triangle is the basic model for a right angled triangle in school. For any other triangle with different sides it's the square of the hypotenuse (the length directly across from the right angle) is equal to the sum of the square of the other 2 sides.
AlexSXI
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18th Feb 10 at 18:19   View User's Profile U2U Member Reply With Quote

Yay! I was right Thank fook as i use maths at work all the time
cpcrampton
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Registered: 16th Feb 07
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18th Feb 10 at 19:45   View User's Profile U2U Member Reply With Quote

I find it quite hard to believe you had to ask this question.
Jake
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18th Feb 10 at 19:51   View User's Profile U2U Member Reply With Quote

yes thankyou im thick as shit. we use the 345 method to check if something is square but for setting out i wanted to know a simple equation we can do on our phone calcs
x14xe sport
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Registered: 27th Apr 09
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18th Feb 10 at 19:51   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by AlexSXI
Isn't that just 5m

In the 3,4,5 method??

I could be very wrong though.


correct, good trick for squaring things up
AlunJ
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Location: Newport
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18th Feb 10 at 19:53   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by JonnyJ
quote:
Originally posted by will_doyle
I put a ruler against the screen and it is 11.5cm






it's 12cm on mine

[Edited on 18-02-2010 by AlunJ]
BlueCorsa
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Registered: 14th Jan 04
Location: Midlands Drives: MB SLK250 CDI
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18th Feb 10 at 20:06   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by JonnyJ
quote:
Originally posted by will_doyle
I put a ruler against the screen and it is 11.5cm





 
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