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

You are not logged in. #26 20131121 17:25:27
Re: Measure length without bend ?
real life situation? 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #28 20131121 17:54:49
Re: Measure length without bend ?You do not understand my question. Just because something is bent does not mean it is an arc. 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #29 20131121 18:47:26
Re: Measure length without bend ?I'm going to assume it is part of a circle and try to construct a formula using the various measurements. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #30 20131121 20:02:30
Re: Measure length without bend ?hi SuperLynx If you know AB, DE and AD then you can work out alpha from equation (2). Then you can work out R from equation (1). Then you can work out arc AB from equation (3). Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #31 20131121 20:11:18
Re: Measure length without bend ?Hi, where s is the pipe length, h is the endtoend length and θ is the sector angle. We may verify that s>h when θ>0 and s>∞ as θ>2π. "Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  Buddha? "Data! Data! Data!" he cried impatiently. "I can't make bricks without clay." #33 20131122 01:09:01
Re: Measure length without bend ?Yes,.... that method is called geogebra!! 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #34 20131122 01:22:18
Re: Measure length without bend ?
I understand, once again, if I saw a bent pipe. #35 20131122 01:29:58
Re: Measure length without bend ?What did you mean by 'degree' in the first post? "Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  Buddha? "Data! Data! Data!" he cried impatiently. "I can't make bricks without clay." #37 20131122 01:49:27
Re: Measure length without bend ?As shown in the figure by bob bundy? "Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  Buddha? "Data! Data! Data!" he cried impatiently. "I can't make bricks without clay." #39 20131122 02:00:08
Re: Measure length without bend ?I think it is a trick question, the length of the pipe is supposed to be same?! Suppose you have a 100m long rope, it is always 100m long whether bent or not.
What did you understand? What do you know about geogebra? 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #42 20131122 02:13:34
Re: Measure length without bend ?Hi SuperLynx; 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #43 20131122 02:26:52
Re: Measure length without bend ?
Is this figure closer, with negligible pipe thickness? "Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  Buddha? "Data! Data! Data!" he cried impatiently. "I can't make bricks without clay." #44 20131122 02:37:10
Re: Measure length without bend ?Agnishom; Yes and replied.
That was clearly far too vague because three different responders have each interpreted your problem differently. Would you start again please? You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #45 20131122 09:57:36
Re: Measure length without bend ?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 ? #46 20131122 10:30:27
Re: Measure length without bend ?
Then you say
Okay, you have no drawing that is of the the correct pipe. You have only 1 measurement. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #48 20131122 10:46:37
Re: Measure length without bend ?Since you do not want to use algebra, this is also difficult to understand. Provide a picture of the pipe, and what you call height. With that I will take it over to a CAS and spline fit a curve smack dab through the center of that baby and voila you have the length of the pipe as if it was straightened out. In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #50 20131122 10:59:13
Re: Measure length without bend ?And the accuracy, in digits after the decimal you require? In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. 