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  1. #1
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    Default Draw tangent circle ?

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    Hi all
    any can know how draw third circle between two circle if one tangent point know (fixed) (point A) and other tangent in other circle
    solve this please:
    tan ex.jpg
    Last edited by issammm; 18th Mar 2014 at 08:42 pm.

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    circle, 3point, tan, tan, tan.

    Start circle command, pick 3p option, type tan, enter, pick small circle, type tan, enter, pick other circle, type tan, enter, pick line.
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    Also C TTR same thing
    A man who never made mistakes never made anything

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    Actually I didn't look at the image carefully but now I realize neither solution would work.
    Sometimes there's a man... I won't say a hero, 'cause, what's a hero? But sometimes, there's a man. And I'm talkin' about the Dude here. Sometimes, there's a man, well, he's the man for his time and place. He fits right in there. And that's the Dude, in Los Angeles. - The Stranger, The Big Lebowski

  5. #5
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    both solution incorrect, if you correct please give me Rx here.
    I know tan tan tan but where i pick third tan and how can I determine tangent as point !???

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    It all depends on the order of picking the tan points.

    I see that I have actually drawn the tangent line to the smaller circle, and that is one of the tan points, as well as the two circles.
    Attached Images

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    Your circle should have a radius of 9.01545790. Will post later the demonstration.

    To draw it create an offset copy to the left circle with above value. Extend the line that join its center with desired tangent point until intersect the new circle; this is the center of the circle you were looking to draw.

    Edit: Eldon was faster with his/her graphical solution. Nice one!
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  8. #8
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    CORRECT, but still can know how you get circle tangents points ??
    you look use approximation way not snap point exactly you seek cursor with vertical line and ....


    can you try for me replace 5.4152 with 5.3923 ??

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    With the new offset, I make the new radius 9.00001399.

  10. #10
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    Quote Originally Posted by eldon View Post
    With the new offset, I make the new radius 9.00001399.
    you are so closely right but still NOT get the target to answer is 9 try it in your computer and see.

    maybe because you use 8 precision I suggest you just using 4 or two enough dear.

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