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  1. #1 to arrogant eleven 
    Forum Ph.D. Heinsbergrelatz's Avatar
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    well, the surface area question you asked me is too rudimentary(anyone with some background in calculus and geometry will grasp it) so instead ill give you volume which is alittle more interesting.

    imagine a height of a cone of "h"
    divide the cone in to infinite many flat cylinders. so each cylinder height would be h/n
    now if we suppose the radius of the bottom surface of the cone as "r" and of course the radius at the other end of the cone as "x" then by the proportion formula
    x:r =h/n:h
    x=r/n
    so the radius from the top to the bottom will be in a series:
    r/n,2r/n,....,(n-1)r/n
    so the volume of each cylinder down along the cone is:

    so we add them all up which is an infinite series, which i think you can do it yourself.

    which will give the result,

    now finish the last part i left out for you ,genius


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  3. #2  
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    Calculus is not nessesary.

    The simplest way is the best, what mathemeticians strive for.

    If you tip the cone on it's side it will roll in a (partial) circle.
    This circle has the radius [sqrroot(r of base^2+ H^2).]

    Use PiR^2 x (radius of base/ radius of this circle).
    add pi(R of base)^2.

    I appreciate the fact that you can at some point solve the problem.

    Good mathemeticians always strive to create the simplest formula to solve problems.

    They would use my formula.

    You and noone else thought about rolling the cone on its side to create a measurable 2 dimensional figure. Without this it is a hard problem.

    Logic makes seemingly difficult questions easy.


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  4. #3  
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    i said simple calculus AND geometry. yea i know you dont need calculus. Also answer my question, cant you read?

    People the surface area of cone is:


    where s= is the slant height.

    man i cant believe i am going through primary stuff...

    to shut you up, alright i will give you a deduction.

    an area of a sector is basically;



    circumference of circle is , then you just plug in to the sector forumla above, of course the slant height is the new radius here so you need to get that separately by Pythagorean theorem.

    happy now?
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  5. #4  
    Forum Sophomore Eleven's Avatar
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    to shut you up
    Which fomula would be preferred?

    My one line algebra or your half a page of calculus, with no answer.

    My math teacher once showed me an easy way to solve a problem when I was using a half a page.

    I felt silly then, as you should now.

    Keep applying your math to solve problems.

    You'll get better as you go, creating simpler formulae.

    BTW I've been called an idiot eight times. That means an idiot just challenged and defeated you.
    Always take hold of things by the smooth handle.

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  6. #5  
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    Quote Originally Posted by Eleven
    BTW I've been called an idiot eight times.
    Come now, it must be much more than that.
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  7. #6  
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    Eleven wrote:
    BTW I've been called an idiot eight times.
    Come now, it must be much more than that.
    A rose by any other name would... SMOKE the smart alecs around here just as much!!

    A cube can be separated into six equal sized pyramids.
    The cube has twice the height, but same length and width.
    So pyramids are 1/6 the size of a cube twice the height.
    So volume of pyramids are L X W X H/3.

    Wasn't it Ptolomy who spent weeks pouring sand from cones into cylinders trying to figure this out?

    Irregular pyramids? We know that any point the same distance from a parrallel when triangulated with two points on the line, sweeps out the same area.

    Apply these 2 dimensions at once to see that irregular pyramids, and cones still have the same 1/3 relationship with cubes and cylinders.

    Simplicity is genius. Genius is simplicity.

    The Universe is just as easy, and just as unneccessarily overcomplicated.
    Always take hold of things by the smooth handle.

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  8. #7  
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    What a Flame WAR here
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  9. #8  
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    What a Flame WAR here
    I hate arguing.

    I would prefer a normal logical friendly scientific discussion, but I don't own or control this site.
    Always take hold of things by the smooth handle.

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  10. #9  
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    No apparently, you can't conduct a "normal logical friendly scientific discussion".

    Edited for typos...
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  11. #10  
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    Not like you, huh?

    Can you show me an example of you having a science discussion?

    Do you have any questions? Answers?

    When you have something scientific to discuss, I'll be ready.
    ----
    Merely saying "no, I'm not ready because I know nothing" will not get a response.

    I would be stupid if I continued to play this game, with you or anybody.
    --
    "Yea, you are stupid!" will not get a response.
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  12. #11  
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    You haven't stated anything coherently enough to respond to.
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  13. #12  
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    through your posts its obvious you dont even know what the formula for volume of cube is + you show no knowledge on simple limits. You argue for simplicity, but your simplicity is simply ignorance.
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  14. #13  
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    Does anyone besides me hear an annoying buzz sound?
    Always take hold of things by the smooth handle.

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  15. #14  
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    Quote Originally Posted by Heinsbergrelatz
    through your posts its obvious you dont even know what the formula for volume of cube is
    A cube can be separated into six equal sized pyramids.
    The cube has twice the height, but same length and width.
    So pyramids are 1/6 the size of a cube twice the height.
    So volume of pyramids are L X W X H/3.
    6x(squarebasepyramid) = cube

    squarebasepyramid = cube/6

    Let H represent the height of the cube, l represent its length, and w its width.

    squarebasepyramid = lwH/6

    Let h represent the height of the pyramid.

    H = 2h

    squarebasepyramid = lwh/3

    I think he knows the formula for volume of a cube, unless I'm missing something.
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  16. #15  
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    Quote Originally Posted by m84uily
    Quote Originally Posted by Heinsbergrelatz
    through your posts its obvious you dont even know what the formula for volume of cube is
    A cube can be separated into six equal sized pyramids.
    The cube has twice the height, but same length and width.
    So pyramids are 1/6 the size of a cube twice the height.
    So volume of pyramids are L X W X H/3.
    6x(squarebasepyramid) = cube

    squarebasepyramid = cube/6

    Let H represent the height of the cube, l represent its length, and w its width.

    squarebasepyramid = lwH/6

    Let h represent the height of the pyramid.

    H = 2h

    squarebasepyramid = lwh/3

    I think he knows the formula for volume of a cube, unless I'm missing something.
    yea you are missing something, next time post while reading the whole thread. I meant volume of the cone.
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  17. #16  
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    Quote Originally Posted by Heinsbergrelatz
    yea you are missing something, next time post while reading the whole thread. I meant volume of the cone.
    I'd read the whole thread and didn't really see anything to infer that Eleven doesn't know the volume of a cone.
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  18. #17  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    Quote Originally Posted by m84uily
    Quote Originally Posted by Heinsbergrelatz
    yea you are missing something, next time post while reading the whole thread. I meant volume of the cone.
    I'd read the whole thread and didn't really see anything to infer that Eleven doesn't know the volume of a cone.
    apparently you cant read.

    see my original question, my first question i posed on this thread is basically; "hey, why dont i let you prove the last part of the volume of a cone?"

    he thinks he is answering my question by going; "surface area of a cone is blah blah blah, then he says this way is blah blah blah, and more bullshit."

    he shows his lack of understanding in mathematics.
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  19. #18  
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    I just see him underestimating you a lot to get under your skin. :P
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  20. #19  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    Quote Originally Posted by m84uily
    I just see him underestimating you a lot to get under your skin. :P
    which is why i refer him as "arrogant." but really his arrogance is out of nothing. You can tell this through other posts of his as well.
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  21. #20  
    Forum Sophomore Eleven's Avatar
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    m84uily

    thank you, thank god for you.

    I demonstsrated not only the relationship between the volume of a cone to a cylinder,1/3, but explained why, something that noone else has ever done as far I know.

    his arrogance is out of nothing. You can tell this through other posts of his as well.
    A blanket statement, no evidence or references.

    Oh I am very arrogant, not because I believe that I know everything.
    My people can tell you that I ask questions and listen and defer to the experts.
    Rarely am I the expert, cosmology, music theory, philosophy, programming, etc. doesn't come up much in everyday living.

    The secret to intelligence, talk when you know, listen when you don't.

    What I know is unique to me, as in everyone.

    I happen to know some hair-curling science that has escaped understanding by current theory.

    I try to share it, but it suggests that people are wrong and they get offended and defensive, and abusive, accusatory, etc.
    You see it right here...

    Edited for content, I have to edit a lot because I understand things visually, not verbally. I struggle to verbalize my thoughts correctly.
    Always take hold of things by the smooth handle.

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  22. #21  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    you are quite a clown.
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  23. #22  
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    Oh please stop this bickering. As is well known, I do not like to abuse my ability to lock or delete threads. But I shall do one or the other unless this childlessness stops.

    Recall this is a mathematics forum
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  24. #23  
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    Quote Originally Posted by Guitarist
    Oh please stop this bickering. As is well known, I do not like to abuse my ability to lock or delete threads. But I shall do one or the other unless this childlessness stops.

    Recall this is a mathematics forum
    its cause i cant have a decent mathematical discussion with eleven. So yea i will stop posting on this thread
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