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How Many Degrees In A Sphere?

Posts (131)

  • reedmon29

    reedmon29

    #741200 - 14 years ago

    The XBox 360 thread was getting off track because of I comment I made, so I decided to make a thread about it and direct the people there.

    In my reasoning, a sphere would have 129,600 square degrees. My logic is that, if you have two circles, one corresponding to the vertical axis, and the other to the horizontal axis, and pick 1 point from each, you will get a corresponding point of a sphere. Each pair would reach a unique point, and since there are 360 degrees on each circle, then the answer would be 360^2 or 126,900 (I'm typing that number from memory... I may be wrong).

    Now, I do know that the surface area of a sphere is 4 * Pi * Radius ^ 2. I also know that the volume is 4 / 3 * Pi * Radius ^ 3. But, we are dealing with degrees, not physical units.

  • Servo

    Servo

    #741203 - 14 years ago

    18

  • Duffman

    Duffman

    #741207 - 14 years ago

    A Zillion.

  • pilotelite

    pilotelite

    #741214 - 14 years ago

    In reply to Duffman, #3:

    Nuh-uh.

    A googlian!

  • Grimson

    Grimson

    #741221 - 14 years ago

    In reply to pilotelite, #4:

    googoplex

    emoteng1016no.gif

  • procrastin8r

    procrastin8r

    #741242 - 14 years ago

    In reply to reedmon29, #1:

    however you would use non Eclidian principles to accurately measure and distance in a trigometric fasion in space... (falls asleep) ZZZZZZZZzzzzzzzzzzzZZZZZzzzzzzzzzzzzzzZzzzzzzzz...

  • cts006

    cts006

    #741252 - 14 years ago

    I think that this is a start but would be to complicated. A sphere would need 2 measures, a mark and bearing from the 0,0 mark at the center of the sphere to the outer edge via a 360 degree circle by intersecting it with a horizontal and vertical plane.

  • neeley_09

    neeley_09

    #741314 - 14 years ago

    In reply to reedmon29, #1:

    This site confuses the hell out of me, so its probably right.Linky

  • cryptohex1

    cryptohex1

    #741416 - 14 years ago

    In the spherical coordinate system (ro, theta, phi)

    ro (a screwed up looking p) is the radius of the sphere
    theta is the angle measurement from the positve x axis
    phi is the angle from the positive z axis down

    phi can't be more than pi, or 180 degrees
    theta's max is 2 pi, or 360 degrees

    so its: (180 possible phi degrees) x( 360 theta degrees) = 64800 possible degree combinations

    But thats not that accurate as far as discribing all the points on a shpere, as degrees break down into minutes and minutes into seconds and seconds into partial seconds.... which is why we use radians in math, much easier and less conversions.

    So basically, there are 64800 whole degree combinations in a sphere

    /doug

  • Bix

    Bix

    #741678 - 14 years ago

    In reply to cryptohex1, #9:

    Correct. Cylindrical coordinates can also describe a sphere, but not as easily.

  • Thanos72286

    Thanos72286

    #741684 - 14 years ago

    In reply to cryptohex1,#9 and Bix, #10:

    Thats why college sucked for me....

  • l337_master

    l337_master

    #741983 - 14 years ago

    there would be infinite
    in a circle there is 360 (everyone should know that)
    if you cut a sphere in half you have a flat side which is a circle and there are infinit ways to cut a sphere in half , so therefore if logic is correct there are inifinte

  • reedmon29

    reedmon29

    #742034 - 14 years ago

    In reply to l337_master, #12:

    Well, that would be true in the same way that a cube has a surface area of infinite feet. Infinite feet, but definitely a finite number of square feet.


    64800 sounds pretty good, but it seems a little low. My number, 126900, is definitely a tad too high, since it counts the same points a couple hundred times. 4 Pi sterandians is probably correct (Most likely because a mathematic website said so), but I have really no clue why. And I have no clue how to convert 4 Pi sterandians into square degrees.

  • BigAlP

    BigAlP

    #742080 - 14 years ago

    You're missing the point, here.

    A degree is a 2-dimensional measurement relative to its own plane. What that means is, in any given sphere, there are an infinite number of 2D circles that can be drawn, and each circle will have a slightly different plane than the previous one. Each circle will have 360 degrees, and 360 * infinity = infinity.

    A good way to approach this, though, is to do it in vector geometry, i.e., give multiple points. That way, you can locate a point in 3D space by providing two degree measurements in 2D space (and the third point being, of course, the assumed distance provided by the radius of the sphere in question).

  • tyguy101a

    tyguy101a

    #742115 - 14 years ago

    In reply to reedmon29, #1:

    42

  • TheDarksage

    TheDarksage FIRST Member Star(s) Indication of membership status - One star is a FIRST member, two stars is Double Gold

    #742118 - 14 years ago

    There are an infinite number of degrees in a sphere or any three dimensional object for that matter.

  • tyguy101a

    tyguy101a

    #742119 - 14 years ago

    In reply to TheDarksage, #16:

    so the answer id 42?

  • reedmon29

    reedmon29

    #742124 - 14 years ago

    In reply to BigAlP, #14:

    Ok then... still, how many square degrees? I understand your point, and it would be valid if I was specifying degrees, but I'm looking for square degrees. There are infinite feet in a square mile, but there is only 5280^2 square feet in a square mile.

  • tyguy101a

    tyguy101a

    #742126 - 14 years ago

    In reply to reedmon29, #18:

    there is no such thing as a square degree.

  • Vendor

    Vendor

    #742135 - 14 years ago

    In reply to reedmon29, #18:

    A degree is a one dimensional measurement (right? because to map a coordinate, you need two sets of degrees) I don't think you can have square degrees.

  • quixotiCfluX

    quixotiCfluX

    #742169 - 14 years ago

    42

  • waffle283

    waffle283

    #742171 - 14 years ago

    its pi

  • reedmon29

    reedmon29

    #742190 - 14 years ago

    In reply to tyguy101a, #19:

    No such thing as a meter per second squared, but I deal with those all the time in school.

    In reply to Vendor, #20:

    A degree is a two dimensional item. 180 degrees of a circle is decidedly 2D. Degrees have no units, but they describe a 2D concept.

  • dan_omac

    dan_omac

    #742203 - 14 years ago

    In reply to Grimson, #5:

    In reply to pilotelite, #4:

    googoplex

    emoteng1016no.gif


    I saw a movie there once.

  • oldie

    oldie

    #742216 - 14 years ago

    In reply to reedmon29, #1:

    you want the degrees fahrenheit or celcius......