Absolute Zero the lowest temperature theoretically possible (zero kelvins, 273.15°C)

Absolute value the distance from zero

Acute angle 0º < θ < 90º

Algebra the branch of mathematics in which letters and other symbols are used to represent numbers and quantities in formulae and equations

Alternate Interior Angle the angle inside two parallel lines, on opposite sides of the transversal

Altitude the length of the perpendicular from the base of a triangle to the vertex opposite the base

Angle the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet

Area the extent or measurement of a surface expressed in square units

Base a number used as the basis of a numeration scale, E.g. 5 is the base in 5²; the Base of a triangle

Binomial an algebraic expression with 2 terms separated by a + or – sign

Circumference the length of the outer edge of a circle

Coefficient the numerical part of an algebraic term, E.g. 3 in 3x

Common Multiple a multiple shared by two or more three

Composite Number a number made up of 2 or more prime factors

Compression the shrinking of a geometric shape or graph

Consecutive immediately following one another

Constant a number or quantity that does not change its value

Corresponding Angles angles on the same side of the transversal and in the same relationship to parallel lines

Decimal fraction a decimal number that is less than the absolute value of 1 

Decimal Number a number containing a decimal point with value greater than 1

Decimal Point a period placed between the ones and the tenths column

Degree the power to which the variable with the greatest exponent is raised E.g. the polynomial x³ – 2x² +4 is degree 3