2.  A member of the set of positive whole numbers {1, 2, 3,... }, negative whole numbers {-1, -2, -3,... }, and zero {0}.

3.  A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.

4.  An integer that is the square of an integer.

5.  Any real number that cannot be expressed as a ratio between two integers.

6.  A number that is rational or irrational, not imaginary.

7.  The density property tells us that we can always find another real number that lies between any two real numbers.

8.  Two angles that have the same vertex and a side in common

9.  A number or symbol multiplied with a variable or an unknown quantity in an algebraic term

10.  The Distance Formula is a variant of the Pythagorean Theorem that you used back in geometry.

11.  The set of all values that an independent variable of a function can have.

12.  The side in a right-angled triangle that is opposite the right angle Hypotenuse

13.  The side which shares the common/neighboring border to the right angle in a triangle is called Legs.

14.  A number capable of being expressed as an integer or a quotient of integers, excluding zero as a denominator.

15.  The set of all values a given function may take on.

16.  The rate of change of a line. For any two points, it is the change in the y values divided by the change in the x values, and is referred to as the change in the rise over the change in the run of a line.

17.  It’s a shorter method to express very large numbers.

18.  A solid figure whose bases or ends have the same size and shape and are parallel to one another, and each of whose sides is a parallelogram.

19.  It’s a graph that plots along two axes at right angles to each other the relationship between two variable quantities, such as height and weight

20.  The equation of a straight line in the form y = mx + b where m is the slope of the line and b is its y-intercept