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constraints (by Kris Ernst)
I'm having difficulties adding constraints that reference other constraints and tangent lines.
I have two circles where the radius of C2 needs to be 2 times the radius of C1.
I can make the radius of both a constraint, but how do I say that there needs to be ratio between the two ?

I am also not able to draw tangent lines from C1 to C2.
Simply drawing the first line I even get a message "Not Closed countour or not all same style".
Selecting a lie and a circle and trying to apply "tangent" constraint I get that's not possible.
(no subject) (by EvilSpirit(Alexey Egorov))
1. For circle radius relation, you can create construction radius line and use Constrain->Length Ratio constraint with 1:2 value.
2. For making tangent line you should create your circle using two connected arcs with the same center point: one of them can be marked construction (green), the second one can be normal (white). So, you can use tangent selecting line and arc.
Wed May 24 2017, 05:06:21
RATIO and TANGENT (by CHRISTIAN FAUDAIS)
Hi

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01 draw two lines
02 add distances ( 10 and 20 for example )
04 delete a distance
05 select the two line
06 select length Ratio in the menu
.....

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01 draw first circle
02 draw a point on the circle
04 draw the second circle
05 draw a point on the second circle