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obtuse angle

obtuse triangleangle measuring greater than 90 degrees

octagonA triangle which has an obtuse angle as one of its interior angles.

octalAn eight (8) sided polygon

P = 8s

odd numberbase 8 number system

odd numbersa whole number that is not able to be divided by two into two equal whole numbers

oddsNumbers not divisible by 2

odds probabilityThe ratio of a payoff to a stake

odds ratioProbability of odds paying off

odious numbersa measure of association between an exposure and an outcome

ohmA number with an odd number of 1s in the binary expansion

ohms lawunit of electrical resistance in the International System of Units

omegathe current through a conductor between two points is directly proportional to the voltage across the two points

V = IR

omicronA letter of the greek alphabet used for math notation.

Ω ω=

open intervalA letter of the greek alphabet used for math notation.

Ο ο

open sentencesInterval with no endpoints

(a,b)

operationA math statement, either true or false, based on values supplied for a variable

operatorA math process

opportunity costany symbol that indicates an operation to be performed such as addition, subtraction, multiplication, division

oppositethe loss of potential gain from other alternatives when one alternative is chosen.

opposite numbersdiametrically different; of a contrary kind.

optionA number on the other side of the number line, with the same distance from zero

option deltaa contract which conveys to its owner, the holder, the right, but not the obligation, to buy or sell a specific quantity of an underlying asset or instrument at a specified strike price on or before a specified date

orderthe theoretical estimate of how much an option's value may change given a $1 move UP or DOWN in the underlying security

order of a matrixa position, rank or arrangement of numbers or objects

order of magnitudeNumber of rows times number of columns

,m x n

order of operationsAn order-of-magnitude difference between two values is a factor of 10

N = a * 10^{2}

ordered paira collection of rules that reflect conventions about which procedures to perform first in order to evaluate a given mathematical expression

PEDMAS - Parentheses, Exponents, Division, Multiplication, Addition, Subtraction

ordered partitionsA pair of numbers signifying the location of a point

(x, y)

ordered triplea list of pairwise disjoint nonempty subsets of s such that the union of these subsets is s.

ordering fractionsThree numbers signifying the location of a point in 3-D space

(x, y, z)

ordering numbersSorting a fraction set ascending or descending

ordinalSorting a number set ascending or descending

ordinatea number such as 1st, 2nd, 3rd, 4th, that shows the position of something in a list of things

1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th

ordinateAbsolute value of the y-coordinate, or perpendicular distance to the x-axis. For the cartesian coordinates (x, y), the abscissa is |y|.

originThe y-coordinate in any point on the Cartesian graph

(x, y)

orthocenterOn a two digit coordinate plane, the point (0, 0), where the x-axis and y-axis cross.

orthogonalThe point where the three altitudes of a triangle intersect

ounceTwo perpendicular lines - two lines forming a 90 degree angle

outcomeA unit of measurement for liquids/solids

outer fencea possible result of an experiment or trial

outlierstart with the IQR and multiply this number by 3. We then subtract this number from the first quartile and add it to the third quartile. These two numbers are our outer fences.

outputan observation that lies an abnormal distance from other values in a random sample from a population

overtimewhat comes out of a function

Hours worked over the standard 40 hour workweek