Assertion: ellipse's radius | /r/CapableOf | square minus smaller radius squared
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text: but hopefully it is all making sense, the main major axis is referring to the wider or the taller portion though basically the larger dimension end points are vertices, minor axis is the smaller diameter and points are co-vertices, foci are where you're two strings would attach and there is a relationship large radius squared minus smaller radius squared is equal to the distance from the center to the focus.