Mathematics. Dictionary

Icosahedron · I

A regular icosahedron: one of the Platonic solids, all of whose faces are regular (equilateral) triangles

Identity · I

An equation which always holds true regardless of the choice of input variables.

Improper fraction · I

A vulgar fraction of which the numerator has a greater magnitude than the denominator, such as 3/2.

Independent variable · I

In an equation, any variable whose value is not dependent on any other in the equation.

Inequality · I

A statement that of two quantities one is specifically less than (or greater than) another. Symbol: or \leq or > or \geq or \ne, as appropriate.

Infinite · I

Greater than any positive quantity or magnitude; limitless.

Infinity · I

A number that has an infinite numerical value that cannot be counted.

Integer · I

A number that is not a fraction; an element of the infinite and numerable set {..., -3, -2, -1, 0, 1, 2, 3, ...}.

Intercept · I

A point where a graph crosses an axis.

Interest · I

The price paid for obtaining, or price received for providing, money or goods in a credit transaction, calculated as a fraction of the amount or value of what was borrowed.

Interior angle · I

The inner angle between two sides of a polygon.

Intersect · I

Of two sets, to have at least one element in common.

Inverse · I

The result of a circle inversion; the set of all such points; the curve described by such a set.

Irrational number · I

Any real number that cannot be expressed as a ratio of two integers.

Isosceles triangle · I

A triangle having at least two sides equal.