About the denomination of an elliptic arc

[lionelwang]

Hi all,

Does anyone know the specific names of the high-curvature arc and the low-curvature arc on an ellipse? Or, do they have special names after all?
Anyone help me figure this out, thank you very much!
Regards.

 

[Simon Bridge]

The middle of the tightly curved bits are called vertices, but the curved bit itself has no special name.
You'd refer to it as a vertex arc.

 

[lionelwang]

You are of great help, thank you very much!

 

[Simon Bridge]

I was wondering if maybe the arcs could be episcopalian and dominican ... but figured that wasn't what you meant :) I think the word you were looking for is "nomenclature".

No worries - have fun.