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Published byCharleen McBride Modified over 9 years ago
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acute angle An angle with a measure less than 90 degrees
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addend Any number that is being added 4 + 4= 8
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analog time Time displayed on a timepiece having hour and minute hands
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area The measure, in square units, of the inside of a plane figure
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array A rectangular arrangement of objects in equal rows or columns
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axis A perpendicular ray on a grid
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bar graph A graph that uses bars of different heights to compare information
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base The top or bottom of a three- dimensional (3-D) figure
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capacity The measure that tells how much liquid a container can hold
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circle A round two-dimensional figure
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closed figure A figure with no gaps or openings
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combination A group of items whose order does not matter
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common denominator Denominator that is the same number in two or more fractions
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cone A solid figure that has a circular base and one vertex
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congruent Having the same size and shape. Congruent angles have the same measure. Congruent segments have the same length.
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cube A rectangular solid having six square faces
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cylinder A three-dimensional (3-D) figure with two circular bases
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decimal A number with a decimal point Example: 3.72
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denominator In a fraction, the number below the fraction bar numerator denominator
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difference The answer to a subtraction equation
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dividend The number that is being divided
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divisor The number that divides the dividend
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edge The line segment where two faces of a solid meet
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Elapsed time The amount of time that passes between two events
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endpoint A point that marks the beginning or end of a line segment or the beginning of a ray
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equal to Shows that two values are the same
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equation A statement that two mathematical expressions are equal
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equivalent Having the same value
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estimate An answer that is close to, but not equal to, an exact answer
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expanded form A number written as the sum of the products of each digit and its place value. Example: 314 300 + 10 + 4
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expression A variable, or any combination of numbers, variables, and symbols that represent a mathematical relationship Example: 24 X 2 + 5
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face A plane figure that serves as one side of a solid figure
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fact family A set of related addition and subtraction or multiplication and division equations using the same numbers. Example: 9x5=45 5x9=45 45/9=5 45/5=9
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factor A whole number that divides evenly into another whole number. Example: 1, 3, 5, and 15 are factors of 15
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fraction A number that names a part of a whole or part of a set of objects Example: 3 4
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function A relation in which every input value has a unique output value
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geometric pattern A pattern made up of shapes Example:
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graph Drawing that uses lines, points, pictures, or bars to show information
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greater than (>) Shows that one value is more than another value Example: 10 > 5
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hexagon A polygon with six (6) sides
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inequality A mathematical sentence that contains a symbol that shows the terms on either side of the symbol are unequal. Example: 3+4> 6
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length The distance between two points or objects. It also refers to the longer side of a rectangle.
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less than (<) Shows that one value is less than another value. Example: 2<6
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line A straight path extending in both directions with no endpoints.
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line of symmetry A line that divides a figure into two halves that are mirror images of each other
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line segment A part of a line with two endpoints
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mean (average) The number found by dividing the sum of a set of numbers by the number of addends.
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median The middle number in an ordered set of data
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mixed number A number that has a whole number part and a fraction part
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mode The number(s) that occurs the most often in a set of data
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multiple The product of a given whole number and another whole number. Example: Multiples of 4 4, 8, 12, 16, 20…
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number sentence An equation or inequality with numbers
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numerator In a fraction, the number above the fraction bar numerator denominator
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obtuse angle An angle with a measure more than 90 degrees
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octagon A polygon with 8 sides
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ordered pair A pair of numbers used to locate a point on a coordinate grid. The first number tells how far to move across, and the second number tells how far to move up.
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origin The point on a grid where the x- axis and the y-axis meet. On an ordered pair the origin is (0, 0).
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parallel lines Lines that never intersect and are always the same distance apart.
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parallelogram A quadrilateral whose opposite sides are parallel. Example:
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pattern A relationship between a set of numbers or shapes
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pentagon A polygon with 5 sides
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perimeter The distance around a figure
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perpendicular lines Two lines, segments or rays that intersect to form right angles
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pictograph A graph that uses pictures to show and compare information
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place value The value indicated by the position of the digit of a number
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point Certain place or location
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polygon A closed figure made up of line segments that meet at their endpoints.
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prediction A statement of something that may happen in the future based on information
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product The answer to a multiplication equation
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pyramid A solid figure with a polygon base and triangular sides that meet at a single point
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quadrilateral A polygon with 4 sides
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quotient The result of division
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ray A part of a line that has one endpoint and continues without end in one direction
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rectangle A quadrilateral with four corners
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rectangular prism A solid figure in which all six faces are rectangles
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reflection (flip) A transformation that produces the mirror image of a figure
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rhombus A parallelogram with four equal sides
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right angle An angle that measures exactly 90 degrees
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right triangle A triangle that has a 90 degree angle
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rotation (turn) A movement of a figure that turns that figure around a fixed point
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rounding A process used to approximate a value
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scale An arrangement of numbers that increase by uniform intervals
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sphere A solid figure that has all points the same distance from the center
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square A rectangle with all four sides the same length
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standard form The way a number is written in numerals Example: 367
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sum The answer to an addition equation.
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table An information display that uses rows and columns to show information
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tally chart A table that uses tally marks to record data
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Three-dimensional figure (3D) A figure that has length, width, and depth
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translation (slide) A movement of a figure to a new position without turning or flipping it
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trapezoid A quadrilateral with exactly one pair of parallel sides
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triangle A closed figure with three sides and three vertices
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triangular pyramid A pyramid with a triangular base
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Vertex (corner) A point where lines, rays, sides of a polygon or edges of a polyhedron meet
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volume The amount of space that a solid figure can hold
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whole numbers The counting numbers plus zero
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x-axis The horizontal number line in a grid
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x-coordinate The first number in an ordered pair
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y-axis The vertical number line in a grid
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y-coordinate The second number in an ordered pair
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