How to make a circle from a line?

how to make a circle from a line ?

A line is the shortest connection between two points.

I assume you wanted to ask how to make a circle from a curve?

Fit a circle to a curve?

You can either create a 3 point circle or divide the curve maybe 10 times or so and then use the command _Circle _FitPoints

image

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not quite, you need to, like in a compass, extrude the body along a curve that is extruded along its axis

like this

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That’s a revolution and the command is called _Revolve

Revolve | Rhino 3-D modeling (mcneel.com)

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