Page 1 of 1

Tip - Draw a circle tangent to 3 equal sized circles

Posted: Sun Sep 02, 2012 4:47 pm
by Clive
To draw a circle tangent to 3 equal sized circles (this ones for you Husky :lol: )

1. Draw 3 circles (same radius) with centers at any given coordinate points.
2. Set up ' layer ' construction and draw polyline (A) to connect all the centers.
3. Draw a line (B) > using Relative Angle ( LR) set to 90 and at an arbitrary length (say e.g. 100) and 'snap' to the center/middle of one line to produce a line perpendicular to it (90 degree right angle).
4. Repeat for the other line (C), the intersection of these two lines provides the center point (D) for the 4th circle.
5. From any circle draw a line (E) from its center to the intersection, this will be the radius for the 4th circle.
Job done. :wink:

Re: Tip - Draw a circle tangent to 3 equal sized circles

Posted: Sun Sep 02, 2012 6:02 pm
by Husky
clive wrote:To draw a circle tangent to 3 equal sized circles (this ones for you Husky :lol: )
Nice! Thank you very much! :D :D :D

Re: Tip - Draw a circle tangent to 3 equal sized circles

Posted: Thu Aug 08, 2013 7:40 pm
by Husky
Hey everybody - just an update on this:

The new version of QCAD pro (3.2.0) has a new circle tool set which provides a perfect solution on this.

Two or three clicks .... and done!!!

You have to test it by yourself - absolute amazing!!!! 8)

Re: Tip - Draw a circle tangent to 3 equal sized circles

Posted: Thu Aug 08, 2013 8:32 pm
by Clive
Husky wrote:You have to test it by yourself - absolute amazing!!!! 8)
Yes its brilliant, what would be interesting is if it were possible to select all the solutions offered (in one go) :idea: 8) :wink:
@Andrew - would this be possible to add in an option for this ? it would make for very interesting pattern making 8)
3 Tangents tool in use.png
3 Tangents tool in use.png (18.26 KiB) Viewed 12870 times

Re: Tip - Draw a circle tangent to 3 equal sized circles

Posted: Wed Aug 14, 2013 9:44 am
by caigner
I just came back from holidays, installed the new version 3.2 and - WOW!!! The new circle tool is brilliant!Superb!

Thanks alot for all the effort which went into this tool!