Tangent line between two non parallel axis circle

Hello, I was trying to connect two circle with tangent line but couldn't able to do that. If anybody knows please let me. If you have no idea where do I get bevel gear for 45 degree motion.

3 Answer

Are you doing a "3D Sketch" or a 2D sketch on a plane between them?
If it's a 3D Sketch, you'll have to draw a "3 Point Arc", then add "Tangent" relations between the arc and the circles.
Tangent arcs must be tangent to what is before them, so they require endpoints to be drawn on so that they could be tangent with.

I've drawn 2 centerlines on the right plane representing the 2 radii, then I drew a tangent arc between them...

Is that line or Arc ?
you can create points on both circle from where you want to pass the line. And after that click on two points by selecting the condition tangent to profile.