Mechanical counting device consisting of a frame holding a series of parallel rods, on each of which beads are strung

The study of calculations involving numbers; the oldest and most elementary branch of mathematics that is used daily by most people

One of the four basic mathematical operations; represents combining collections of objects together into a larger collection

The branch of mathematics concerning the study of the rules of operations and relations; in another context, a collection of sets

A measure of the middle value of a data set; typically, but not always, the sum of the values divided by the number of values

The figure formed by two lines or rays sharing a common point, or the measure of rotation about that common point

A type of the previous answer that is strictly greater than 0° and less than 90°

Quantity expressing the two-dimensional size of a defined part of a surface; for a circle, it is πr²

A reference line; in the 2-D Cartesian plane, there are two of them, commonly labeled with two letters of the Latin alphabet

Property of some operations in which the grouping in which the operations are performed does not matter; e.g. (1 × 2) × 3 = 1 × (2 × 3) = 6

Hint

Answer

The magnitude of an oscillation; e.g. the A in the expression Asin(θ)

Smooth curve joining two points; for a circle, its length is equal to rθ

Line or curve that, tending to ∞, approaches a given curve arbitrarily closely but never touches it

For a given function, f, it's a function G whose derivative is equal to f, i.e. G' = f; more formally known as an indefinite integral

Line segment from the center of a regular polygon to the midpoint of one of its sides; has a corresponding definition for a circle

Geometric figure consisting of the region lying between two concentric circles; colloquially referred to as a 'ring'

A finite sequence of steps for carrying out a procedure or solving a problem; common term in computer science, as well

Proposition that is not proved nor demonstrated but considered to be self-evident; the one 'of choice' is fundamental to set theory

Mathematical concept with several meanings, perhaps most notably the conjugate transpose of a matrix or operator

A group in which the binary operation is commutative; named after a mathematician who helped prove impossible directly solving for the roots of a polynomial equation of degree > 4

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