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| A quality or characteristic, such as color, thickness, size, and shape. |
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| A closed plane figure with all points of the figure the same distance from the center. The equation for a circle with center (h, k) and radius r is: (x - h)2 + (y - k)2 = r2 |
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| Solid figure with six congruent, square faces |
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| A three dimensional figure with two parallel congruent circular bases and a lateral surface that connects the boundaries of the bases. More general definitions of cylinder may not require circular bases. |
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| A number that is the result of subtraction |
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| A line segment where two faces of a polyhedron meet. |
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| Event A set of possible outcomes. |
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| The branch of mathematics that explores the position, size, and shape of figures. |
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| Height A line segment extending from the vertex or apex of a figure to its base and forming a right angle with the base or plane that contains the base. |
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| A one-dimensional measure that is the measurable property of line segments. |
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| There are several statistical quantities called means, e.g., harmonic mean, arithmetic mean, and geometric mean. However, “mean” commonly refers to the arithmetic mean that is also called arithmetic average. Arithmetic mean is a mathematical representation of the typical value of a series of numbers, computed as the sum of all the numbers in the series divided by the count of all numbers in the series. Arithmetic mean is the balance point if the numbers are considered as weights on a beam. |
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| To represent a mathematical situation with manipulatives (objects), pictures, numbers or symbols. |
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| A symbol representing a number. Hindu-Arabic numerals (0-9) are the ones most commonly used today. Other types include Egyptian, Babylonian, Mayan, Greek, and Roman numerals. |
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| A number that names the place or position of an object in a sequence or set. |
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| A predictable or prescribed sequence of numbers, objects, etc. Patterns and relationships may be described or presented using multiple representations such as manipulatives, tables, graphics (pictures or drawings), or algebraic rules (functions). |
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| A specific location in space that has no discernable length or width. |
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| A parallelogram with four right angles. |
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| Representations Physical objects, drawings, charts, words, graphs, and symbols that help students communicate their thinking. |
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| A set is a finite or infinite collection of distinct objects in which order has no significance. |
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| The edge of a polygon (e.g., a triangle has three sides), the face of a polyhedron, or one of the rays that make up an angle. |
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| A translation, where every point of a figure is moved in the same direction and by the same distance. |
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| A three-dimensional figure in which all points on the figure are equidistant from a center point. |
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| A rectangle with four congruent sides; also, a rhombus with four right angles. |
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| A polygon with three sides. |
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| The point common to the two rays that form an angle; the point common to any two sides of a polygon; the point common to three or more edges of a polyhedron. |
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| The force with which a body is attracted to Earth or another celestial body, equal to the product of the mass of the object and the acceleration of gravity. |
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| The numbers in the set {0, 1, 2, 3, 4, ...} |
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