No, that's not necessarily the case

來源: 2010-07-22 05:16:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀:

The only part of the diagram that is relevant to this discussion is the part enclosed by lines PA and PB and minor arc AB. Drawing any number of chords that collectively encompass all of minor arc AB results in reflex angles exclusively.