Draw a circle with tangente+point+radius

Hi!

Is there an easy way to draw a circle of 20mm that would be tangent to a line and touch one point? There is the option to draw a circle with tangent-tangent-tangent (TTT) or tangent-tangent-radius, but not tangent-point-radius...

And I'm also trying to do a circle responding to : circle-point-radius.

Thanks!