Shortened proof of areacirclem1 with cniccibl, changed antecedent in areacirclem4, modifying its proof and proof of areacirclem5 to match.
Shortened proof of areacirclem1 with cniccibl, changed antecedent in areacirclem4, modifying its proof and proof of areacirclem5 to match.

metamath/set.mm,metamath/set.mm,metamath/set.mm