Good morning,

I would like to let you know an idea I had regarding the circle tool.
I feel it difficult to take into consideration centers and radi of the circles I create with Inkscape.
Therefore, I suggest adding a new way (not deleting the pre-existing one) to create circles, as in Geogebra (you can try it for free online), where the first time you click defines the center and the final double click the radius, so you can see how the circle grows while you are editing it and it would be easier to do tangents, as well as many other things...

I hope you'll take this idea into consideration.

Have a nice day!