Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 Re: Help Me ! » Surface Area Math Question » 2015-02-08 16:20:41

CIV wrote:

You can not simply derive measurements such as height, width, and depth for a complicated shape such as a human body or car with more data. Even if you had this data, its extremely difficult to do. If your object was simple such as a cube, cylinder, or triangle and had more data,... we could calculate this a lot easier.

Not knowing any more than just the SA of say a box,... we can derive dimensions for say a box but there are infinitely many dimensions. This means the box can be of any shape or even size. If you give us the SA, L, and W, we can calculate the depth for example. If you only give the SA and L, that would mean the width and depth would be infinite.

I understand. A program I use only gave me those measurements from a irregular object, the program must be getting the information some how, some way, that is what I want to know ?

We both can agree that the program is not spitting out a random value for the surface area of the object !

#2 Re: Help Me ! » Surface Area Math Question » 2015-02-08 12:07:11

bob bundy wrote:

Cover the solid in approximate cm squares and count them:

http://i.imgur.com/vC1eIA8.gif

Bob

I don't understand what you mean ?

#3 Re: Help Me ! » Surface Area Math Question » 2015-02-07 08:10:32

What does the surface Area is 395.2722194 Unit^2 represent for a irregular object ?

#4 Re: Help Me ! » Surface Area Math Question » 2015-02-06 15:48:34

How is the program giving me the values posted in my first message for a irregular solid ?

#5 Re: Help Me ! » Surface Area Math Question » 2015-02-06 01:44:10

bob bundy wrote:

Those would be tricky to work out.  There's no easy formula as people and cars have many shapes.

You could estimate by making a square grid and holding it against the surface and counting up squares.  Hard to be accurate though.

There are formulas for some solids: sphere, cone, pyramid etc.

Bob

What if you pretended as though the car, or person was contained, I believe as you are saying in a solid shape; as in a cube etc, that would work ?

#6 Re: Help Me ! » Surface Area Math Question » 2015-02-05 14:47:19

What if the surface is not a rectangle, but shape, for example, a car, or a human body ?

#7 Re: Help Me ! » Surface Area Math Question » 2015-02-05 02:32:56

The image loaded, my question is; so you can break down the surface area ^2 into the 6 faces of a rectangle ?

#8 Re: Help Me ! » Surface Area Math Question » 2015-02-04 16:39:42

bob bundy wrote:

http://i.imgur.com/FdGAlYn.gif

Bob

What are you telling me, I'm still puzzled ?

#11 Re: Help Me ! » Surface Area Math Question » 2015-02-03 15:37:08

That is all I know about the object ?

#12 Help Me ! » Surface Area Math Question » 2015-02-03 12:51:21

SuperLynx
Replies: 22

I have an object which it's surface Area is 395.2722194 Unit^2.  I want to break this number down into the height, width and depth of the object is this possible ?

#13 Help Me ! » Thickness of thousands of an inch » 2014-12-23 13:17:19

SuperLynx
Replies: 2

Could someone tell me how thick .003 thousands of an inch is, I need a visual cue ?

#15 Re: Help Me ! » Measure length without bend ? » 2013-11-22 04:35:41

What information would you need to make it easier to calculate, what the actual length of the pipe was before it was bent ?

#16 Re: Help Me ! » Measure length without bend ? » 2013-11-21 14:58:32

I'd like to know how you solve this?

#18 Re: Help Me ! » Measure length without bend ? » 2013-11-21 12:06:59

That is another thread, please keep it separate smile

#19 Re: Help Me ! » Measure length without bend ? » 2013-11-21 11:57:32

The picture is in post #34 the measurements are from top to bottom, top of the pipe in the image, to the bottom of the pipe in the image.  Those measurements are found in Post #1.

#20 Re: Help Me ! » Measure length without bend ? » 2013-11-21 11:36:45

Tell me the information you need and why you need it ?

#21 Re: Help Me ! » Measure length without bend ? » 2013-11-21 10:57:36

I don't know what is so difficult to understand.  Looking at the pipe image in post #34, you see it's a pipe that is bent.  How can you measure it's length as if it was straight, not bent ? I've been told that I need to measure the bent angle of the pipe as well as the other straight areas, is there not a more intelligent way to do this, then having all these measurements at hand ?

#22 Re: Help Me ! » Measure length without bend ? » 2013-11-21 03:10:14

The picture in post 34 is not correct, it's close enough.

#24 Re: Help Me ! » Measure length without bend ? » 2013-11-21 02:32:43

gAr wrote:

What did you mean by 'degree' in the first post?

Degree as in it's not completely bent, it's bent to a degree, to a angle !

#25 Re: Help Me ! » Measure length without bend ? » 2013-11-21 02:22:18

Agnishom wrote:

Yes,.... that method is called geogebra!!

I understand, once again, if I saw a bent pipe.

stainless-steel-u-bend-pipes.jpg

And I wanted to know it's length before it was bent, since I don't know the history of this pipe can this be found out without algebra ?

Board footer

Powered by FluxBB