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Thread: v23

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  1. #1
    Join Date
    Mar 2009
    Posts
    291

    Angry v23

    How do i draw a circle tangent to two other circles?When i dont know where the center should be.

  2. #2
    Join Date
    Feb 2009
    Posts
    2143
    Use the command "Arc 3 Entities". Use your two circles as two of the elements, and place a point (before this command) for the location of the third point (or use some other object as the third point. When you do this, you may not get a full circle. If you don't, you can select the three elements in the reverse direction to get the other part of the arc filled in, or you can put a point at the center of the incomplete arc, and use that to make a circle (delete the original arc after your place the center point, or put it on another layer, if you don't want it part of the "finished" sketch).

  3. #3
    Join Date
    Feb 2006
    Posts
    992
    It's hard to answer your question 'cause depend how one radius locate respect relate to other one. Normally, draw the bigger radius first then after that the smaller radius.
    The best way to learn is trial error.

  4. #4
    Join Date
    Mar 2008
    Posts
    29
    Quote Originally Posted by 1234567 View Post
    How do i draw a circle tangent to two other circles?When i dont know where the center should be.
    Basic geometric construction techniques serve this situation well.

    Offset the diameter of each circle by the radius of the new circle.

    The intersection point of these diameters will be the center point of the new circle.

    Use point intersection command to drop a point at this intersection.

    Then arc snap to drop the new circle at that point.

  5. #5
    Join Date
    Mar 2009
    Posts
    291

    tangent circles

    need large circle tangent to two small circles
    Attached Thumbnails Attached Thumbnails 5106552-2010-01-08-16-48-45.jpg  

  6. #6
    Join Date
    Mar 2008
    Posts
    29
    Like this?
    Attached Thumbnails Attached Thumbnails tangent.jpg  

  7. #7
    Join Date
    Mar 2009
    Posts
    291

    circles

    Ya this is what i want. i did line tangent and then deformed it looks about right but i need the line to be a 6.00 raidus.
    Attached Thumbnails Attached Thumbnails 5106552-2010-01-08-18-50-46.jpg  

  8. #8
    Join Date
    Mar 2009
    Posts
    291

    Smile

    Ok i see how you did it thanks for the help

  9. #9
    Join Date
    Mar 2008
    Posts
    29
    NP, I always knew that 9th grade geometry class was good for something

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