How to make a curve and/or radius

[WillAdams (William Adams (Carbide 3D))]

Draw a suitable sized circle and then use a Boolean operation?

Alternately use the curve tool:

Let's draw an "ellipse" with new users

(the title of this post hearkens back to a small book / card which Warren Chappell created, “Let’s make a “B” for Bennet” — I was fortunate to meet Mr. Chappell when he was Artist-in-Residence at UVA on a school field trip when I was young, and he was the author, along with his cousin Oscar Ogg, of a number of books I remember from my youth.) Note that the below is obsoleted in current versions of Carbide Create by the ability to asymmetrically scale a circle into an oval/ellipse. Okay, step-b…