Given two intersecting lines, the amount of rotation about the point of intersection required to bring one into correspondence with the other.

The base 2 method of counting in which only the digits 0 and 1 are used.

A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).

A system of denoting numbers where each digit represents a multiple of a power of ten.

Being the same in quantity, size, degree, or value.

A rational number expressed in the form a/b.

The branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs.

The regular polygon of 17 sides.

An unbounded quantity that is greater than every real number.

The matrix of partial derivatives of a function.

A curve drawn in three dimensions that cannot be untangled.

A quantity representing the power to which a fixed number (the base) must be raised to produce a given number.

The middle term of a series of numbers arranged in order of magnitude, or (if there is no middle term) the average of the middle two terms.

The set of positive integers.

An angle greater than pi/2 radians (90°) and less than pi radians (180°).

A positive integer n > 1 which is only divisible by 1 and n.

A polynomial equation in x of the form ax^2 + bx + c = 0.

A four-sided polygon with both pairs of opposite sides parallel and all sides the same length.

The trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse.

The number 1,000,000,000,000.

Being the only one of its kind; unlike anything else.

The amount of space a solid body occupies.

The measurement or extent of something from side to side.

The horizontal axis of the Cartesian plane.

The vertical axis of the Cartesian plane.

The only integer that is neither positive nor negative.