A

absolute value

The distance of a number from zero; the positive value of a number.

acute angle

A positive angle measuring less than 90 degrees.

acute triangle

A triangle each of whose angles measures less than 90 degrees.

addend

In the example... 3 + 4 = 7 The 3 and the 4 are called addends.

additive identity

The number zero is called the additive identity because the sum of zero and any number is that number.

additive inverse

The additive inverse of any number x is the number that gives zero when added to x. The additive inverse of 5 is -5.

adjacent angles

Two angles that share both a side and a vertex.

algebra

The word "algebra" is a distortion of the Arabic title of a treatise by al-Khwārizmī about algebraic methods.

algorithm

An algorithm is a specific set of instructions for carrying out a procedure or solving a problem.

angle

The union of two rays with a common endpoint, called the vertex.

arc

A portion of the circumference of a circle.

area

The number of square units that covers a shape or figure.

arithmetic

Arithmetic is the branch of mathematics dealing with numerical computation.

associative property of addition

(a + b) + c = a + (b + c)

associative property of multiplication

(a x b) x c = a x (b x c)

average

A number that represents the characteristics of a data set.

axiom

An axiom is a rule in math that is always true. In fact, it is SO obviously true that you don't have to prove it's true.

axis

An axis is a line with respect to which a curve or figure is drawn, measured, rotated, etc. The most common axes are Cartesian axes.

axis of symmetry

A line that passes through a figure in such a way that the part of the figure on one side of the line is a mirror reflection of the part on the other side of the line.

absolute value

The distance of a number from zero; the positive value of a number.

acute angle

A positive angle measuring less than 90 degrees.

acute triangle

A triangle each of whose angles measures less than 90 degrees.

addend

In the example... 3 + 4 = 7 The 3 and the 4 are called addends.

additive identity

The number zero is called the additive identity because the sum of zero and any number is that number.

additive inverse

The additive inverse of any number x is the number that gives zero when added to x. The additive inverse of 5 is -5.

adjacent angles

Two angles that share both a side and a vertex.

algebra

The word "algebra" is a distortion of the Arabic title of a treatise by al-Khwārizmī about algebraic methods.

algorithm

An algorithm is a specific set of instructions for carrying out a procedure or solving a problem.

angle

The union of two rays with a common endpoint, called the vertex.

arc

A portion of the circumference of a circle.

area

The number of square units that covers a shape or figure.

arithmetic

Arithmetic is the branch of mathematics dealing with numerical computation.

associative property of addition

(a + b) + c = a + (b + c)

associative property of multiplication

(a x b) x c = a x (b x c)

average

A number that represents the characteristics of a data set.

axiom

An axiom is a rule in math that is always true. In fact, it is SO obviously true that you don't have to prove it's true.

axis

An axis is a line with respect to which a curve or figure is drawn, measured, rotated, etc. The most common axes are Cartesian axes.

axis of symmetry

A line that passes through a figure in such a way that the part of the figure on one side of the line is a mirror reflection of the part on the other side of the line.