# I

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Identities (trigonometry)

Identity Element

Identity Property of Addition

Identity Property of Multiplication

If and only if statement

If then statement

Image

Imaginary numbers

Implicit

Implicit formula

Impossible

Improper fraction

Income Tax

Inch (measurement)

Incircle

Inconsistent equations

Independent events

Independent variable

Indirect proof

Indirect measurement

Individual retirement account (IRA)

Inductive reasoning

Inductive set

Inequality

Inequality sign

Inference

Infinite set

Infinite series

Infinity

Injective mapping

Inscribed

Inscribed angle

Inside and outside

Interior/on/exterior

Integer number

Intersecting lines

Inscribed angles

Integers

Intercept

Intercepted arc

Interpolation

Interpolation (logarithms)

Interpolation (trigonometry)

Interquartile range

Interval

Interval scale

Intersecting lines

Intersecting planes

Intersection (set)

Inverse function

Inverse matrix

Inverse of a statement

Inverse operation

Inverse trigonometric Functions

Inverse variation

Irrational numbers

Irregular polygon