| Area | The extent of a 2-dimensional surface enclosed within a boundary |
| Angle | The space between two lines or planes that intersect |
| Bisect | Cut in half or cut in two |
| Circle | Ellipse in which the two axes are of equal length |
| Circumference | The length of the closed curve of a circle |
| Complementary Angles | Two angles whose sum is a right angle |
| Composite Number | An integer that is divisible without remainder by at least one positive integer other than itself and one |
| Cone | A shape whose base is a circle and whose sides taper up to a point |
| Congruent Figures | Figures that have the same shape and size. |
| Cube | A hexahedron with six equal squares as faces |
| Cylinder | A solid bounded by a cylindrical surface and two parallel planes (the bases) |
| Decameter | A metric unit of length equal to ten meters |
| Decimal | A proper fraction whose denominator is a power of 10 |
| Denominator | The number below the line in a fraction, the divisor of a fraction |
| Diameter | The length of a straight line passing through the center of a circle and connecting two points on the circumference |
| Distributive Property of Multiplication over Addition | States that to mulitiply a sum by a number, you can multiply each addened by the same number and add the products. |
| Dividend | A number to be divided by another number |
| Divisor | The number by which a dividend is divided |
| Edge | A sharp side formed by the intersection of two surfaces of an object |
| Equilateral Triangle | A three-sided regular polygon |
| Evaluate | Place a value on |
| Exponent | A mathematical notation indicating the number of times a quantity is multiplied by itself |
| Faces | A flat surface of a polyhedron |
| Factor | Any of the numbers (or symbols) that form a product when multiplied together |
| Hypotenuse | the side of a right triangle opposite the right angle |
| Identity Element of Addition | Zero is the identity element in addition because adding zero to a number does not change its value |
| Identity Element of Multiplication | One is the identity element in multiplication because multiplying a number by one does not change its value |
| Inverse Property | The sum of a number and its opposite |
| Irrational Number | A real number that cannot be expressed as a rational number |
| Inverse Relationships | A relationship between two factors in which the factors move in opposite directions |
| Isosceles Triangle | A triangle with two equal sides |
| Kilo | A prefix meaning thousand |
| LCM | The smallest multiple that is exactly divisible by every member of a set of numbers |
| GCF | The greatest commmon factor between two or more numbers |
| Line | Goes on forever in both directions |
| Line of Symmetry | a |
| Mean | a |
| Median | a |
| Mixed Number | a |
| Mode | a |
| Multiple | a |
| Obtuse Angle | a |
| Order of Operation | a |
| Origin | a |
| Parallel Lines | a |
| Parallelogram | a |
| Percent | a |
| Perimeter | a |
| Perfect Square | a |
| Perpendicular Lines | a |
| Pi | a |
| Plane | a |
| Prime Number | a |
| Polygon | a |
| Pythagorean Theorem | a |
| Quadrant | a |
| Quotient | a |
| Radius | a |
| Range | a |
| Ratio | a |
| Rational Number | a |
| Ray | a |
| Rectangle | a |
| Regular Polygon | a |
| Rhombus | a |
| Scalene Triangle | a |
| Square Root | a |
| Supplemenary Angle | a |
| Surface Area | a |
| Variable | a |
| Alternate Interior Angles | a |
| Alternate Exterior Angles | a |
| Volume | a |
| Vertical Angles | a |