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    Drawing lines tangent to a circle

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    • D Offline
      dammerel
      last edited by

      hi guys
      can a line be drawn tangent to a circle or what is the best way to fillet two lines

      thanks Andrew

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      • G Offline
        Gidon Yuval
        last edited by

        Hi Andrew,
        Have a look at these two skippys. I think they answer you question.

        Cheers

        Gidon

        Tangent-1.skp

        Tangent-2.skp

        If you don't know where you're going, you're never going to get there.

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        • W Offline
          watkins
          last edited by

          Dear Andrew,

          Drawing a line tangent to a circle is a little tricky as each circle is made up of a finite number of line segments (the default is 24). If you draw a circle and then use the line tool to draw a line touching the circle the inference engine will take you to either a segment end-point or a segment mid-point. If you snap to an end-point the line will turn magenta when your attached line is parallel to one of the line segments connected to that end-point. Strictly speaking (and for a 24 segment circle), to get a true tangent to the circle you should snap to a segment's end-point, draw the line parallel to that line segment and then rotate it 7.5 degrees about the end-point. Experiment!

          Hope this helps,

          Kind regards,
          Bob

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          • Jean LemireJ Offline
            Jean Lemire
            last edited by

            Hi Andrew, hi folks.

            See attached SU file for ideas.

            Fillet between lines.skp

            Jean (Johnny) Lemire from Repentigny, Quebec, Canada.

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            • Jean LemireJ Offline
              Jean Lemire
              last edited by

              Hi Andrew, hi folks.

              See attached SU file for ideas.

              This is inspired by this site:

              http://www.mathopenref.com/consttangents.html

              Tangent to circle.skp

              Jean (Johnny) Lemire from Repentigny, Quebec, Canada.

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              • D Offline
                dammerel
                last edited by

                thanks all for the replies..i now have lots of ideas..

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                • Y Offline
                  yaza
                  last edited by

                  Why complicate your life when the answer could be easy.
                  Draw a circle with any amount of edges.You now want to draw a tangent line to this circle.Chose any vertex, it connects two segments, go at the end of those and join them with the tape mesure tool, then slide a //guide line to your chosen vertex you now have a tangent.Et voila 😉

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