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Yff center of congruence.svg Yff central triangle and Yff center of congruence of triangle Krishnachandranvn talk created this work entirely by myself May UTC Krishnachandranvn talk Krishnachandranvn en Cczero Original upload log en Yffcenterofcongruence svg bytes Krishnachandranvn An improved image bytes Krishnachandranvn