![]() ![]() Incomplete circles don't bound a region in the plane, so there's no area to talk about. So a complete or perfect circle is a specific geometric figure. When we do compass-and-straightedge geometry, we are always drawing little scratches of arcs, which are not complete circles. (So you can see why "perfect" has come to mean "flawless.") It used to mean "complete." When something was perfected, that meant you were done working on it. We have changed the definition of "perfect" over the years. ![]() If all circles are full, then there's no sense in saying "full circle." ![]() We have a phrase, "to come full circle" which means "to get back to where one started." If there is a "full circle" then there are not-full circles. ![]()
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