| A | B |
|---|
| Acute Angle | An angle with less than 90 degree angles |
| Acute Triangle | A triangle that has three acute angles |
| Addend | A number that is added to another number |
| Angle | Formed where two rays intersect-named by the vertex, or by two points and the vertex (the middle letter) |
| Ascending | In order from least to greatest |
| Associative Property of Addition | Addends can be grouped differently, and the sum is always the same |
| Associative Property of Multiplication | Factors can be grouped differently, and the product is always the same |
| Average | The number found by dividing the sum of a set of numbers by the number of addends |
| Axis | The horizontal or verticle number line used in a graph or grid |
| Bar Graph | Compares facts about groups |
| Benchmark | A point of reference used to compare other things to |
| Capacity | The amount a container can hold |
| Cardinal Number | Tells how many |
| Certain | An event will always happen |
| Circle Graph | Shows data as parts of a whole |
| Common Factors | Numbers that are factors of at least two numbers |
| Common Multiples | Multiples of one number that are also multiples of another number |
| Commutative Property of Addition | Addends can be added in any order, and the sum is always the same |
| Commutative Property of Multiplication | Factors can be multiplied in any order, and the product is always the same |
| Compatible Numbers | Numbers that are easy to compute mentally |
| Decagon | 10-sided polygon |
| Denominator | The bottom number in a fraction-names the total number |
| Descending | In order from greatest to least |
| Difference | The answer in a subtraction sentence |
| Dividend | The number being divided into groups |
| Divisible | One number is divisible when the remainder is zero after dividing by another number |
| Divisor | The number the dividend is divided by |
| Equally Likely | The same chance of happening |
| Equilateral Triangle | A triangle with all congruent sides and angles |
| Equivalent | Numbers having the same value |
| Equivalent Decimals | Different names for the same number or amount-allow you to add or subtract zeroes to the right of a decimal |
| Equivalent Ratios | Show the same relationship |
| Expanded Form | A Number showing the sum value of each digit |
| Exponent | The top number that tells how many factors there are |
| Factor | A number that is multiplied by another number |
| Formula | A set of symbols that expresses a mathematical rule |
| Frequency | The number of times an event occurs |
| Greatest Common Factor | The greatest number that is a factor of at least two numbers |
| Heptagon | 7-sided polygon |
| Hexagon | 6-sided polygon |
| Impossible | An event will never happen |
| Intersecting Lines | Lines that cross at one point |
| Interval | The distance between numbers on the scale |
| Inverse Operations | Opposite action, undoes the other |
| Isosceles Triangle | A triangle with 2 congruent sides and 2 congruent angles |
| Least Common Multiple | The least number that is a common multiple |
| Leaves | The ones digits of a stem-and-leaf plot |
| Likely | An event has more chances to happen |
| Line | A straight path that goes on forever, named by two points |
| Line Graph | Shows changes over time |
| Line Plot | Keeps track of data as it's collected |
| Line Segment | A straight path that has two definite endpoints, names by the two endpoints |
| Map Scale | A ratio that compares the distance on a map with the actual distance |
| Mass | The measure of quantity of matter of an object |
| Mean | The average: add all the numbers and divide by the number of addends |
| Median | The middle number when they are in order |
| Mixed Decimal | A number that is made up of a whole number and a decimal |
| Mode | The number that occurs the most |
| Multiple | The product of two or more numbers |
| Nominal Number | Names things |
| Nonagon | 9-sided polygon |
| Number Line | A line of numbers with larger numbers to the right |
| Numerator | The top number in a fraction-names the number that fit a condition |
| Obtuse Angle | An angle with more than 90 angle |
| Obtuse Triangle | A triangle that has one obtuse angle |
| Octagon | 8-sided polygon |
| Order of Operations | The correct order in which operations are done within an expression |
| Ordered Pair | Two numbers used to locate points on a grid |
| Ordinal Number | Tells position or order |
| Parallel Lines | Lines that will never intersect |
| Pentagon | 5-sided polygon |
| Percent | A ratio of some number to 100 |
| Period | Each group of three numbers starting from the right |
| Perpendicular Lines | Lines that cross at right angles |
| Pictograph | Uses pictures to count and compare data |
| Plane | A flat surface that goes on forever, named by any 3 points |
| Point | A specific location in space, named by a letter |
| Point Symmetry | A figure can be turned around a central point and still look the same |
| Polygon | A closed figure with straight sides |
| Prime Number | Only two factors; 1 and itself |
| Prism | A solid figure that has two congruent and parallel faces called bases, named by the polygon base |
| Probability | The chance that an event will happen |
| Product | The answer in a multiplication sentence |
| Property of One | When one factoris 1, the product is the other factor |
| Pyramid | A solid figure with a polygon base and three of more other faces that are triangular, named by the polygon base |
| Quadrilateral | Polygon with 4 sides and 4 angles |
| Quotient | The andwer in a division problem |
| Radius | A line segment that connects the center of a circle with a point on the circle |
| Range | The difference between the greatest and least numbers |
| Ratio | Compares two numbers, can be written three ways |
| Ray | Part of a line with one endpoint and goes on forever in one direction, named by the endpoint and one other point |
| Rectangle | A quadrilateral with 2 pairs of congruent sides and 4 right angles |
| Reflection | Flip a figure over a line so it has the same shape but the opposite direction |
| Remainder | The number of individual pieces left over in division |
| Rhombus | A quadrilateral with 4 congruent sides and 2 pairs of congruent angles |
| Right Angle | An angle with square corners, 90 angles |
| Right Triangle | A triangle that has one right angle |
| Rotation | Turn a figure around a point but it has the same shape |
| Scale | A series of numbers placed at fixed distances |
| Scalene Triangle | A triangle with no congruent sides or angles |
| Scientific Notation | A number written as a product of two factors; one between 1 and 10, the other a power of 10 |
| Similar | Figures have the same shape |
| Simplest Form | The greatest common factor of the numerator and denominator is 1 |
| Slope | The incline of a line |
| Square | A quadrilateral with 4 congruent sides and 4 right angles |
| Standard Form | A number using the digits 0-9 with each digit having a place value |
| Stem | The tens digit of a stem-and-leaf plot |
| Stem and Leaf Plot | Shows data organized by place-value |
| Straight Angle | An angle that equals 180 |
| Sum | The answer in an addition sentence |
| Translation | Slide a figure but it has the same shape and direction |
| Trapezoid | A quadrilateral with 1 pair of parallel sides |
| Tree Diagram | Shows all the possible outcomes of an event |
| Triangle | A polygon with three sides and three angles |
| Venn Diagram | Uses shapes to compare data |
| Vertex | The point where two rays meet to form an angle |
| Volume | The amount of space a solid figure occupies |
| Word Form | A number using only words |
| Zero Property for Addition | When zero is added to an addend, the sum is the other addend |
| Zero Property for Multiplication | When one factor is 0, the product is 0 |
| Area | The number of square units needed to cover a surface |
| Base | The two congruent and opposite polygons of a prism |
| Chord | A line segment that connects any two points on a circle |
| Circle | A closed figure with all points the same distance from a center point |
| Circumference | The perimeter of a circle |
| Composite Number | More than two factors |
| Cone | A solid figure with a circular base and one vertex |
| Congruent | Figures that have the same size and same shape |
| Cube | A solid figure with six congruent square faces |
| Cylinder | A solid figure with two parallel bases that are congruent circles |
| Diameter | A chord that passes through the center of a circle |
| Distributive Property | Multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products |
| Edge | The intersection of two faces of a solid figure |
| Equivalent Fractions | Name the same number or amount |
| Face | A flat surface of a solid figure |
| Least Common Denominator | The least common multiple of two of more denominators |
| Like Fractions | Fractions that have the same denominators |
| Line Symmetry | A figure that is folded on a line and looks the same on both sides |
| Mixed Number | A whole number and a fraction |
| Parallelogram | A quadrilateral with 2 pairs of congruent sides, and 2 pairs of parallel sides |
| Perimeter | The distance around a figure |
| Perimeter | The distance around a figure Pi |
| Pi | The relationship of the diameter to the circumference of a circle, equal to 3.14 |
