[ª] , [©] , [^]
, [¨]Inscribed angle / What relationship?(GC World : Various problems ,Is the useless one useless?)
Probably many students think it is useless when they see two results.
But very few teachers disregard this.
Maybe teachers will ask like following.
EHow much is the lower angle?
E129‹. Is this related to the result a little while ago?
GC/Win