It is the starting point and on a number line it is 0. It is a point where the X axis and Y axis cross on a two-dimensional graph. Usually denoted by the letter ?O?.
Origin
-
![Definition of Obelus]( "Obelus")
Obelus -
![Definition of Oblique]( "Oblique")
Oblique -
![Definition of Oblong]( "Oblong")
Oblong -
![Definition of Obtuse Angle]( "Obtuse Angle")
Obtuse Angle -
![Definition of Obtuse Triangle]( "Obtuse Triangle")
Obtuse Triangle -
![Definition of Octagon]( "Octagon")
Octagon -
![Definition of Octahedron]( "Octahedron")
Octahedron -
![Definition of Octal]( "Octal")
Octal -
![Definition of Odd Number]( "Odd Number")
Odd Number -
![Definition of Odds]( "Odds")
Odds -
![Definition of Odometer]( "Odometer")
Odometer -
![Definition of Open Curve]( "Open Curve")
Open Curve -
![Definition of Open Sentence]( "Open Sentence")
Open Sentence -
![Definition of Operation]( "Operation")
Operation -
![Definition of Operator]( "Operator")
Operator -
![Definition of Order of Operations]( "Order of Operations")
Order of Operations -
![Definition of Ordered Pair]( "Ordered Pair")
Ordered Pair -
![Definition of Ordering]( "Ordering")
Ordering -
![Definition of Ordinal Number]( "Ordinal Number")
Ordinal Number -
![Definition of Ordinate]( "Ordinate")
Ordinate -
![Definition of Origin]( "Origin")
Origin -
![Definition of Orthocenter]( "Orthocenter")
Orthocenter -
![Definition of Orthogonal]( "Orthogonal")
Orthogonal -
![Definition of Ounce]( "Ounce")
Ounce -
![Definition of Outlier]( "Outlier")
Outlier -
![Definition of Oval]( "Oval")
Oval
