MathGloss/O

/Ordinate / /Origin /

/Obtuse Angle/ /Obtuse triangle/ /Odds/ /Odd number/

/Octagon/ /One-dimensional/ /One-to-one Correspondence/ /Operation/ /Operator/

/Opposite Angles/ /Opposities (integers) / /Opposities (rational numbers) / /Opposities (real numbers) / /Ordered pair / /Ordered triple /

/Order of operations/

/Ordering (whole number)/ /Ordering (integers) / /Ordering (rational) / /Ordering (decimals )/ /Ordering (real number)/

/Ordinal number/ /Ordinal scale/

/Ordinate / /Origin/

/Orthocenter/ /Outcome of an event/ /Outlier/

/Over integers / /Over real numbers /