Absolute value 
Always a positive number that refers to the distance of a number from
0. The symbol to show the absolute value is two vertical lines
around the number, as:   3  = 3

Acute angle 
The measure of an angle between 0 and 90 degrees; or with less than 90
degree radians. Also a positive angle that measures less than 90
degrees.

Addend 
A number involved in addition. If two numbers are added, both numbers are addends.

Algebra 
A branch of mathematics that substitutes
letters for numbers. An algebraic equation represents a scale,
what is done on one side of the scale with a number is also done to the
other side of the scale. The numbers are constants.

Algorithm 
A stepbystep problemsolving procedure for computational mathematical problems.

Angle 
A number involved in addition. If two numbers are added, both numbers are addends.

Arc 
A section or portion of the circumference of the circle.

Area 
The space measured in square units that any 2 dimensional shape or polygon occupies.

Arithmetic 
A branch of mathematics usually concerned with
the four operations (adding, subtracting, multiplication and division)
of positive numbers.

Array 
A set of numbers that will follow a specific pattern. An orderly arrangement often in rows, columns or a matrix.

Attribute 
A characteristic to describe an object usually within a pattern. The attribute usually refers to the shape, size, or color.

Average 
The middle or most common in a set of data. There are three types of average in mathematics  the mean, the median and the mode.

Axis 
the quadrants of a coordinate plane. The vertical axis is usally
referred to as the y axis and the horizontal axis is usually referred
to as the x axis.












