Κυριακή 20 Οκτωβρίου 2019

HYACINTHOS 17122

Dunno if Darij already reported this (when we produced
radical centers by the score, the ETC was *much* shorter).
Anyway. Draw three circles around A,B,C with radii
ra,rb,rc (the excircle radii ra=F/(s-a) etc.).
Then #1490 is their radical center.

Hauke Reddmann

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