# 100 Math Words That Start With O

## List of Math Words That Start With O

Below are common math words that start with o.

• Octagon
• Obtuse
• Operand
• Operation
• Odd
• Outcome
• Orthogonal
• Oblique
• Origin
• Odd number
• Ordinate
• Ounce
• Octave
• Onto
• Odd function
• Order
• Operator
• One-to-one
• Outlier
• Oscillation
• Orthocenter
• Orthogonal matrix
• Oscillatory
• Observations
• Ordered pair
• Oblique angle
• Overestimate
• Odd permutation
• Ordinal number
• Overlapping
• Orthogonal complement
• Open set
• Onto function
• Orthocenter theorem
• Octahedron
• Outcome space
• Odd multiple
• Overlapping circles
• Ordinary differential equation
• Oscillatory behavior
• Objective function
• Orthogonal projection
• Open interval
• One-to-one correspondence
• Overdetermined system
• Overlapping events
• Orthogonal vectors
• Octillion
• Order of magnitude

## Math Terms That Start With O (Divided by Subjects)

### Geometry Terms That Start With O

• Obtuse Angle: Angle greater than 90 degrees but less than 180 degrees.
• Octagon: An eight-sided polygon with equal angles.
• Orthocenter: Point where altitudes of a triangle intersect.
• Oval: Rounded, elongated shape resembling an ellipse.
• Oriented Angle: Angle with direction for rotation measurement.
• Oblate Spheroid: Spherical shape slightly flattened at poles.
• Opposite Side: Side opposite to a given angle in a triangle.
• Orthogonal Matrix: Matrix whose transpose is its inverse.
• Outlier: Data point significantly different from others.
• One-Point Perspective: Linear perspective drawing with one vanishing point.

### Algebra Terms That Start With O

• Ordered Pair: Pair of numbers representing a point in a coordinate system.
• Origin: Point (0, 0) in a coordinate plane.
• Octagon: Polygon with eight sides and angles.
• Operation: Mathematical action like addition, subtraction, etc.
• Odd Number: Integer not divisible by 2.
• Orthogonal: Perpendicular or at a right angle.
• Outlier: Data point significantly different from others in a set.
• One-to-One Function: Each input maps to a unique output.
• Obtuse Angle: Angle greater than 90 degrees but less than 180 degrees.
• Onto Function: Every element in the range has a corresponding element in the domain.

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