So you need a quick review on basic math operations of definitions. As is tradition, we shall start by defining several words and what they mean when you are working with math problems.

Addition	The total amount of two or more numbers. The answer of adding numbers is the sum. Example: 1+2 = 3; 3 is the sum of the addition of 1 and 2.
Algebra	A branch of math using letters to represent numbers. Example: x + 7 = 15. (Solve for x; x = 8)
Arithmetic	The use of addition, subtraction, multiplication, and division to find an answer. Example: 4+12=16; 12-4=8; 12/4=3; 2*8=16
Circle	A curved line with every point equal distance from the center. Example:
Composite Number	Any whole number that can be divided by another number evenly except by itself and 1 Examples: 21 (21/7=3), 24 (24/4=6), 9 (9/3=3), 10 (10/2 = 5)
Congruent	Equal angles. Example: 45 degrees and 45 degrees.
Coordinate Axis	Two perpendicular lines forming four quadrants.
Counting Number	Same as "Natural Number."
Denominator	The bottom number in a fraction Example:3/4, 4 is the denominator.
Difference	The amount numbers differ from each other. Example: 10-7=3 the difference of 10 and 7 is 3
Directrix	A fixed line associated with a parabola .
Dividend	The number being divided. Example: 15 ÷3=5; 15 is the dividend.
Division	The discovery to find out how many times a number is contained in another number. Example: 15 ÷3=5; 3 is in 15 five times.
Divisor	The number to divide with. Example: 15÷3=5; 3 is the divisor.
e	The number used as the base for natural logarithms. e = 2.71828183
Ellipse	A curved line with the sum of the distances from imaginary points (foci) to each point on the curve is constant
Exponent	A small figure placed to the upper-right of a number showing the number of times to multiply that number by itself. Example: 3² (3x3=), 2³ (2x2x2 = 8)
Focus	An imaginary point seen in parabolas, hyperbolas, and ellipses. Plural: foci.
Fraction	A representation of division and another way of showing decimals. Examples: 3/4 means 3 divided by 4, which is .75. Also, 1 ½ is the same as 1.5.
Geometry	The branch of mathematics that deals with points, lines, planes and figures.
Hexagon	A six-sided polygon.
Hyperbola	A curved line with the difference of the distances from imaginary points (foci) to each point on the curve is constant.
Imaginary Number	An even root of a negative number; square root of -1 is denoted as 'i.' The square root of -4 cannot be -2 because (-2*-2 = 4, not -4). Examples: i, 5i, etc.
Improper Fraction	A fraction that has its numerator of the larger than the denominator. Example: 25/12, 3/2, etc.
Inequality	An equation written with a greater than, a less than sign, or a not equal to sign. Basically, an equation without an equals sign. Examples: 7 + x > 10; 1 + 2 < x.
Integer	Any positive or negative whole number and zero. Example: -3, -2, -1, 0, 1, 2, 3,...
Line	An infinite path connecting an infinite number of points. A linear line is perfectly straight (diagonal/verticle/horizontal.)
Logarithm (Log)	The power to which a number is raised - the exponent. Example:
Mixed Number	A whole number and a fraction. Example: 3½
Multiplication	The repeated addition of a number. Example: 4x4 = (4+4+4+4) = 16.
Natural Log	Logarithm with base e Example: ln 5
Natural Number	Any positive, whole number. Example: 1, 2, 3, 4,...
Numerator	The top number in a fraction. Example: 4/5; 4 is the numerator.
Octagon	An eight-sided polygon.
Parabola	Set of points equal distance from a focus and a directrix.
Parallel	Two (or more) lines that will never intersect. (Lines with the same slope.) Examples: Y = 3/4x + 2 and Y = 3/4x + 5 are parallel lines.
Pentagon	A five-sided polygon.
Percent	A number out of 100. The percent can be greater than 100. Example: 50%, 75%.
Perpendicular	Lines that intersect at right angles (90 degrees.)
Pi	The ratio of the circumference to the diameter of a circle (3.1415926...)
Plane Geometry	The branch of geometry using only two-dimensional figures.
Point	A location with no dimensions, shape, or size.
Polygon	A closed figure with at least four sides and four angles.
Prime Number	Any integer that cannot be divided by another number evenly except by itself and 1. Examples: 2, 3, 5, 7, 11, 13,...
Product	The result of multiplying two or more numbers together. Example: 4x4=16; 16 is the product.
Pyramid	A shape with a polygonal base and triangular sides meeting at a common point (vertex.)
Quadrant	One quarter (1/4) of a coordinate plane axis.
Quadrilateral	A four-sided polygon.
Quotient	The answer of one number divided by another. Example: 33÷3 = 11; 11 is the quotient.
Radical	A root sign.
Ray	A line having one endpoint, where the other endpoint continues to infinity.
Real Number	Any number that is not imaginary.
Rectangle	A quadrilateral with four right angles.
Regular Polygon	A polygon with all sides equal and all interior angles congruent
Rhombus	A quadrilateral with equal sides.
Right Angle	A 90 degree angle.
Segment	A piece of a line with two endpoints.
Solid Geometry	The branch of geometry using 3D objects and figures.
Space	The 3D continuous expanse and of the matter contained within; volume.
Square	A rectangle with all four sides equal.
Square Root	The number that when multiplied by itself will produce a given number (the square.) Example: square root of 4 = 2 because 2x2 = 4.
Subtraction	Getting the difference between two numbers.
Sum	The answer from adding numbers Example: 2+4=6; 6 is the sum.
Transversal	A line that intersects at least two other lines.
Trapezoid	A quadrilateral with only two sides parallel.
Vertex	A corner point of a geometric figure formed by lines, planes, or both.
Vertical Angle	Equal angles formed by the intersection of two or more lines.
Whole Number	Any positive integer, some definitions include 0. Example: 1, 2, 3, 4,...234, 235, etc.