Okay, after chewing on this for a while, here's how it comes down for me.
All straight lines are parts of the areas they define. All curved lines aren't.
However, if we call the 19-foot arc a 2-point line, instead of a 3-point line...
All lines except the semi-circle line are parts of the areas they define.
But if the arc is as above AND if Nevada's right about the semi-circle and its line...
All lines are parts of the areas we define.
We're really getting somewhere! (In case anyone cares!)
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