**Math:** the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically.

Also, mathematical procedures, operations, or properties.

## Dictionary : Letter O

Obelus

Oblique

Oblique Cone

Oblique Cylinder

Oblique Prism

Oblique Pyramid

Oblong

Obtuse Angle

Obtuse Triangle

Octagon

Octahedron

Octal

Odd Number

Odds

Odometer

One Dimensional

Open Curve

Open Interval

Open Sentence

Operation

Operator

Opportunity Cost

Opposite Numbers

Opposite Side

Or

Order Of Magnitude

Order of Operations

Ordered Pair

Ordering

Ordinal Number

Ordinary Differential Equation

Ordinate

Origin

Origin Symmetry

Orthocenter

Orthogonal

Oscillating Series

Ounce

Outcome

Outlier

Oval

Ovoid