AY press release is saying it will fly a triangle Route HEL-VAA-UME-VAA-HEL but would a triangle route be HEL-VAA-UME-HEL. Decades ago AY operated a triangle Route HEL-WAW-SXF-HEL and there have been triangle routes within Finland like HEL-VRK-SVL-HEL and not so Long ago HEL-KOK-TMP-HEL, HEL-MHQ-TKU-HEL vv, HEL-JYV-KEM-HEL, HEL-KEM-KOK-HEL vv and HEL-KAJ-JYV-HEL. I wondered this because one member of cabin crew described in IG recently her route HEL-ARN-BGO and back as a triangle Route. What’s the correct terminologi?