Modeling
About Archicad's design tools, element connections, modeling concepts, etc.

Construction of a given radius circle tangent to the two lin

johanes
Contributor
Someone asked me this question: how to build a circle with a given radius, tangent to two concurrent straight, flush, some?
At first sight the problem seems simple, but try and tell me some how.
4 REPLIES 4
Dontknow
Enthusiast
Which ArchiCAD version are you using?
Two concurrent straight are two line crossing each other?
Architectural construction designer, draftsman, modeller
ArchiCAD 25.
vistasp
Advisor
johanes wrote:
Someone asked me this question: how to build a circle with a given radius, tangent to two concurrent straight, flush, some?
At first sight the problem seems simple, but try and tell me some how.
Does the tangential method not work for you? Haven't used it myself (and don't have AC in front of me) so not sure if the third point can be a radius by simply typing "R" before input.

http://helpcenter.graphisoft.com/guides/archicad-19-int-reference-guide/documentation-2/drafting/lin...

EDIT: Just tried and it doesn't work that way.
= v i s t a s p =
bT Square Peg
https://archicadstuff.blogspot.com
https://www.btsquarepeg.com
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Anonymous
Not applicable
Is this what you are looking for?

Fillet the two lines at the radius of your circle. Move your circle over the arc and re-intersect the lines.



Doug
Circle Tangent to Two Lines Archicad.PNG
Anonymous
Not applicable
This works too.
Circle Tangent to Two Lines 2 Archicad.PNG