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Thread: Bisect a Circle

  1. #1
    Join Date
    Mar 2006
    Location
    South Carolina, USA
    Posts
    40

    Default Bisect a Circle

    How do I bisect a circle with a line so that the top and bottom sections of the circle are the same size?

  2. #2
    Join Date
    Aug 2004
    Location
    The Netherlands
    Posts
    710

    Default Re: Bisect a Circle

    Draw a circle. Draw a straight line with the Shape editor tool (hold CTRL key to keep it straight). Select circle and line and hit CTRL+Shift+L (or go to Arrange > Alignment). Select align centrally from either the top or bottom menus (depends whether your line was vertical or horizontal) and click Apply. Now go to Arrange > combine shapes > Slice.
    Use the shape editor to edit the nodes or "break open" the resulting shapes so you actually get the arcs without the straight line in between them.

    BTW, your line should be on top of the circle for this to work, not under it

  3. #3

    Default Re: Bisect a Circle

    Here is a short video tutorial.
    Attached Files Attached Files

  4. #4

    Default Re: Bisect a Circle

    Here's another short video tutorial that illustrates how to get an arc of some precise central angle (not just a semicircle)
    Attached Files Attached Files

  5. #5
    Join Date
    Dec 2005
    Location
    Middletown, Delaware
    Posts
    163

    Default Re: Bisect a Circle

    Thanks, cursor! Even though I didn't ask the question, your answers were simple and to the point...I believe even I could do that now.

    Thanks again,
    Bob

  6. #6

    Default Re: Bisect a Circle

    Quote Originally Posted by cursor View Post
    Here is a short video tutorial.
    Good clear voice their Curtis, unlike my mumbling

    Couple things to speed up the task. You do not need to draw a line 'outside' of the circle to slice it into two halves.

    Click image for larger version. 

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    Also, as mentioned by The Alien, the quicker way to split the ellipse into two unjoined arcs is to 'break' at the points.


    Click image for larger version. 

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  7. #7

    Default Re: Bisect a Circle

    Thanks.
    I learn new stuff every day, Steve.
    Problem is ... I sometimes forget it the day after!

    I'll redo those two video tutorials (at some point), incorporating the more efficient techniques.

  8. #8
    Join Date
    Feb 2007
    Location
    Mesquite, TX (Dallas County)
    Posts
    159

    Default Re: Bisect a Circle

    Thanks to all on showing these techniques in XARA and lending your experience. This is applicable in ALL versions right?

    chuck

  9. #9

    Default Re: Bisect a Circle

    Yes (as far as I am aware). The techniques also work for Web Designer.

  10. #10

    Default Re: Bisect a Circle

    Actually Web Designer does not have the option to 'convert to editable shape' from an ellipse etc. Neither can it 'convert a line to a shape.'

 

 

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