Which equation is correct regarding the diagram of circle cap o ?
A
m angle XZY is equal to 1 half times open paren A plus b close parenB
m angle XOY is equal to 1 half times open paren A minus b close parenC
m angle XOY is equal to 1 half times open paren A plus b close parenD
m angle XZY is equal to 1 half times open paren A minus b close paren