Rotating about an ellipse

Hello everyone!

So I am trying to divide an ellipse into 24 segments.

To do this, I tried creating lines for the center of the ellipse, but it does not evenly space the segments because an ellipse has several different radius points. The lines I drew came for one radius point at the center, and therefore does not evenly divide the ellipse.

I want the lines creating these segments to be perpendicular to the ellipse at each point, but I don’t know how to do this. Is there a way to rotate lines around an ellipse (multiple radius points) instead of a circle (one radius point)?

Let me know if this does not make sense!

Thank you,


The guidelines in this screen shot as well as the horizontal and vertical lines pass through the edge segments at 90°. Is that what you want?

No matter what the spacing along the edge of the ellipse, lines placed at 90° to the edge segments will not intersect along the midline of the ellipse.

Yes, that’s what I want. I’d also like the arc between the lines to be equal. So all of the arcs created by the lines are, for example, 2 feet.

Like this?

I used Fredo’s Divide Edges which is part of FredoTools.

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Yes, that looks right

Pretty sure I learn about one new thing a day from Dave!! :joy:


so is that a spline traced over a scaled arc?

No. I drew a circle with 96 sides and rotated it so that edges were perpendicular with axis lines. Then I scaled it to make an ellipse.

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