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Math Help - find points along a circle in relation to other points on the circle

  1. #1
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    find points along a circle in relation to other points on the circle

    I've made a diagram to explain this better:
    http://www.zerostatic.com/diagram.jpg

    I would like to space out the red circles so their edges touch. I guess I need to know how many degrees away to place a circle based on the radii ?

    Also if I were to place these along an Ellipse, can I use the same formula that a circle would use?
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  2. #2
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    Don't have time to delve into this right now, but consider this as a basis.

    If you have a circle with radius = 1.000

    and you wish to surround it with semicircles, one option is to get 90 circles with radius 0.0349 and space them every 4 degrees.
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  3. #3
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    thanks but the circles that will be added are of random varying sizes, so I would need to somehow calculate based on the radius of the circle next to it.
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  4. #4
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    Quote Originally Posted by zerostatic View Post
    thanks but the circles that will be added are of random varying sizes, so I would need to somehow calculate based on the radius of the circle next to it.
    I understand. Sometimes it's easier to derive a formula when you have a working example
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  5. #5
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    Maybe it makes more sense if I reword this...
    If I have a circle who's circumference is known - say 10.5 meters.
    And I want to plot two points on that circle who's arc distance need to be 1 meter. How would I calculate this in order to plot the two points on the circumference of the circle?
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