Date: 15/07/2014 12:34:29
From: JTQ
ID: 559621
Subject: Maths Help

Hi all… long time no hear.. and not because I’m deaf.

I’ve got a 5-sided figure and need to know what the size would be of one particular edge if any of the other sides had their length changed. Is there some sort of formula available? Happy to play with trig if needed, sin cos and tan strike no fear in me.

Here’s the shape and dimensions:

I know how big the side is right now, but will need to work out what the size of the angled line will be if any other side was adjusted. Is this possible? And if so, how would it be calculated?

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Date: 15/07/2014 12:38:52
From: furious
ID: 559622
Subject: re: Maths Help

The angled line is the long side of a perpendicular triangle…

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Date: 15/07/2014 12:47:26
From: furious
ID: 559624
Subject: re: Maths Help

To get the terminology right:

The angled line is the hypotenuse of a right triangle…

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Date: 15/07/2014 12:52:08
From: dv
ID: 559626
Subject: re: Maths Help

Call the left side L, right side R, top side T, bottom side B, and your slanting slide S.

S= sqrt( (L-R)^2 + (T-B)^2)

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Date: 15/07/2014 12:53:45
From: JTQ
ID: 559629
Subject: re: Maths Help

Thanks Furious & DV :)

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Date: 15/07/2014 12:57:56
From: sibeen
ID: 559632
Subject: re: Maths Help

Unlike the others I’d probably try to use Pythagoras’ theory and go from there.

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Date: 15/07/2014 12:58:32
From: dv
ID: 559633
Subject: re: Maths Help

ROFL

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Date: 15/07/2014 12:59:47
From: Bubblecar
ID: 559635
Subject: re: Maths Help

>Here’s the shape and dimensions

Making a harpsichord?

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Date: 15/07/2014 13:03:37
From: JTQ
ID: 559637
Subject: re: Maths Help

Bubblecar said:


>Here’s the shape and dimensions

Making a harpsichord?

:)

I’m actually working as a library developer for my bro’s cabinetmaking software company. The library is what has all the available cabinets in it, and I’m currently working on a 2-door pantry but the door (here, the hypotenuse) isn’t staying as the width it should be if the other sides have their lengths adjusted.

It’s basically playing out like a bit of programming, but with a lot more maths than I’m used to. The programming project I did last week had hardly any maths in it…

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Date: 15/07/2014 13:04:51
From: dv
ID: 559639
Subject: re: Maths Help

JTQ said:


Bubblecar said:

>Here’s the shape and dimensions

Making a harpsichord?

:)

I’m actually working as a library developer for my bro’s cabinetmaking software company. The library is what has all the available cabinets in it, and I’m currently working on a 2-door pantry but the door (here, the hypotenuse) isn’t staying as the width it should be if the other sides have their lengths adjusted.

It’s basically playing out like a bit of programming, but with a lot more maths than I’m used to. The programming project I did last week had hardly any maths in it…

Look, I’ve got to say…

The overall task you are describing is pretty mathsy. I wouldn’t give it to someone who didn’t have a good knowledge of geometry.

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Date: 15/07/2014 13:13:35
From: JTQ
ID: 559644
Subject: re: Maths Help

dv said:


JTQ said:

Bubblecar said:

>Here’s the shape and dimensions

Making a harpsichord?

:)

I’m actually working as a library developer for my bro’s cabinetmaking software company. The library is what has all the available cabinets in it, and I’m currently working on a 2-door pantry but the door (here, the hypotenuse) isn’t staying as the width it should be if the other sides have their lengths adjusted.

It’s basically playing out like a bit of programming, but with a lot more maths than I’m used to. The programming project I did last week had hardly any maths in it…

Look, I’ve got to say…

The overall task you are describing is pretty mathsy. I wouldn’t give it to someone who didn’t have a good knowledge of geometry.

That’s fair enough.. this one particular cabinet has this maths bit to it but besides that isn’t too bad. I’m a bit rusty with geometry but have studied a little it previously.

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Date: 15/07/2014 14:31:38
From: PermeateFree
ID: 559669
Subject: re: Maths Help

For what it is worth, I make it 1202.0815

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Date: 15/07/2014 14:39:05
From: JTQ
ID: 559670
Subject: re: Maths Help

PermeateFree said:


For what it is worth, I make it 1202.0815

That’s what I’ve found as well, but only with the current dimensions.

I’ve added it up like this: (Sqrt((1050-200)^2)+((1430-580)^2)) but it’s giving me an answer of 723350mm?? Surely I’ve done something wrong…?

DV’s formula was:
Call the left side L, right side R, top side T, bottom side B, and your slanting slide S.
S= sqrt( (L-R)^2 + (T-B)^2)

Original image:

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Date: 15/07/2014 14:40:20
From: JTQ
ID: 559671
Subject: re: Maths Help

Nevermind… grammatical error.

=SQRT^2)+((1430-580)^2))

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Date: 15/07/2014 14:41:08
From: JTQ
ID: 559673
Subject: re: Maths Help

grr…

=SQRT (((1050-200)^2)+((1430-580)^2))

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Date: 15/07/2014 14:54:48
From: PermeateFree
ID: 559677
Subject: re: Maths Help

JTQ said:


grr…

=SQRT (((1050-200)^2)+((1430-580)^2))

All and more here.
http://en.wikipedia.org/wiki/Pythagorean_theorem

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Date: 15/07/2014 15:07:20
From: jjjust moi
ID: 559679
Subject: re: Maths Help

The squaw on the hippopotamus is equal to the sum of the squaws on the other two sides.

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Date: 15/07/2014 15:19:17
From: bob(from black rock)
ID: 559683
Subject: re: Maths Help

jjjust moi said:


The squaw on the hippopotamus is equal to the sum of the squaws on the other two sides.

Don’t want to be picky, but isn’t it other it the other two hides?

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Date: 15/07/2014 15:23:12
From: jjjust moi
ID: 559684
Subject: re: Maths Help

bob(from black rock) said:


jjjust moi said:

The squaw on the hippopotamus is equal to the sum of the squaws on the other two sides.

Don’t want to be picky, but isn’t it other it the other two hides?


The squaw with the twins slept in the middle, in the version I heard.

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Date: 15/07/2014 15:26:17
From: PermeateFree
ID: 559687
Subject: re: Maths Help

jjjust moi said:


The squaw on the hippopotamus is equal to the sum of the squaws on the other two sides.

Where does the right-handed trimangle fit into all this?

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Date: 15/07/2014 15:45:31
From: jjjust moi
ID: 559702
Subject: re: Maths Help

PermeateFree said:


jjjust moi said:

The squaw on the hippopotamus is equal to the sum of the squaws on the other two sides.

Where does the right-handed trimangle fit into all this?


It’s an old mnemonic joke, where an indian chief has three wives, one sleeps on the middle on a hippopotomus hide, in due course she has twins while the other two only have a single birth each.

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Date: 15/07/2014 16:03:30
From: PermeateFree
ID: 559715
Subject: re: Maths Help

jjjust moi said:


PermeateFree said:

jjjust moi said:

The squaw on the hippopotamus is equal to the sum of the squaws on the other two sides.

Where does the right-handed trimangle fit into all this?


It’s an old mnemonic joke, where an indian chief has three wives, one sleeps on the middle on a hippopotomus hide, in due course she has twins while the other two only have a single birth each.

Ah I see, it is a right-angled hide they are sleeping on. Now it makes sense.

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Date: 15/07/2014 16:05:06
From: Tamb
ID: 559716
Subject: re: Maths Help

PermeateFree said:


jjjust moi said:

PermeateFree said:

Where does the right-handed trimangle fit into all this?


It’s an old mnemonic joke, where an indian chief has three wives, one sleeps on the middle on a hippopotomus hide, in due course she has twins while the other two only have a single birth each.

Ah I see, it is a right-angled hide they are sleeping on. Now it makes sense.


Small problem. Squaws live in North America. Hippos live in Africa.

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Date: 15/07/2014 16:06:09
From: jjjust moi
ID: 559718
Subject: re: Maths Help

Tamb said:


PermeateFree said:

jjjust moi said:

It’s an old mnemonic joke, where an indian chief has three wives, one sleeps on the middle on a hippopotomus hide, in due course she has twins while the other two only have a single birth each.

Ah I see, it is a right-angled hide they are sleeping on. Now it makes sense.


Small problem. Squaws live in North America. Hippos live in Africa.


Cheap Chinese import.

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Date: 15/07/2014 16:07:07
From: Tamb
ID: 559720
Subject: re: Maths Help

jjjust moi said:


Tamb said:

PermeateFree said:

Ah I see, it is a right-angled hide they are sleeping on. Now it makes sense.


Small problem. Squaws live in North America. Hippos live in Africa.


Cheap Chinese import.


The squaw or the hippo?

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Date: 15/07/2014 16:08:07
From: furious
ID: 559721
Subject: re: Maths Help

Could be one of Escobar’s Hippos got (even more) lost…

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Date: 15/07/2014 16:12:06
From: jjjust moi
ID: 559722
Subject: re: Maths Help

Tamb said:


jjjust moi said:

Tamb said:

Small problem. Squaws live in North America. Hippos live in Africa.


Cheap Chinese import.


The squaw or the hippo?


The hide was part of the dowry.

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Date: 15/07/2014 16:13:56
From: Tamb
ID: 559723
Subject: re: Maths Help

Heisenberg and Schrödinger are driving, and get pulled over. Heisenberg is in the driver’s seat, the officer asks “do you know how fast you were going?” Heisenberg replies, “No, but I know exactly where I am!” The officer looks at him confused and says “you were going 108 miles per hour!” Heisenberg throws his arms up and cries, “Great! Now I’m lost!”

The officer, now more confused and frustrated orders the men outside of the car, and proceeds to inspect the vehicle. He opens the trunk and yells at the two men, “Hey! Did you guys know you have a dead cat back here?” Schrödinger angrily yells back, “We do now.

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Date: 15/07/2014 16:22:42
From: Ian
ID: 559728
Subject: re: Maths Help

The angle of the dangle is directly proportional to the heat of the meat, but inversely proportional to the sag of the bag.

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Date: 15/07/2014 17:48:32
From: SCIENCE
ID: 559829
Subject: re: Maths Help

ideally the constraints would off bean moor explicit

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