| A | B |
|---|
| Acute Angle | An angle that has a measure less than 90 degrees |
| Acute Triangle | A triangle with 3 acute angles |
| Addends | Numbers that are added |
| Algebraic Expression | An expression that in cludes a variable |
| Algebraic Pattern | A number pattern that can be represented using an algebraic expression |
| A.M. | The hours from 12 midnight to 12 noon |
| Angle | A figure formed when 2 rays or line segments meet at a vertex |
| Bar Graph | A graph that shows data by using bars of different lengths |
| Benchmark | Personal or familiar point of reference that can be used to estimate length |
| Centimeter (cm) | A metric unit of length; 100cm = 1m |
| Certain | Describes an event that must ahppen; it has a probability of 1 |
| Compatible numbers | Numbers that are close to actual numbers and are easy to compute with mentally |
| Composite numbers | A whole number that has more that 2 factors |
| Congruent | Describes figures that have the same shape and size |
| Constant | A number in an expression |
| Coordinate grid | A grid formed by a horizontal line called the x-axis and a vertical line called the y-axis |
| Corresonding angles | Angles that are in the same position in similar or congruent figures |
| Corresponding sides | Sides that are in the same position in similar or congruent figures |
| Data | Information |
| Day | A period of time equal to 24 hours |
| Decimal | A number with a decimal point |
| Decimal point (.) | A period spearating the ones from the tenths in a decimal |
| Degree | A unit for measuring angles |
| Denominator | The bottom number of a fraction that tells how many equal parts there are |
| Difference | The result of subtraction |
| Distributive property of multiplication over addition | The rule that states that multiplying a sum by a number gives the same result as multiplying each addend in the sum by that number and then adding the products |
| Dividend | A number to be divided |
| Divisor | The number by which the dividend is divided |
| Elapsed time | The time from the start of an event to its end |
| Endpoint | A point marking the end of a line segment |
| Equation | A number sentence that uses an equal sign (=) to show that two expression are equal |
| Equilateral triangle | A triangle with three equal sides and angles |
| Equivalent fractions | Two or more fraction that name the same part of a whole |
| Estimate | An answer that is close to the exact answer |
| Evaluate | To find the value of a numerical or algebraic expression |
| Expanded form | A way of writing a number as a sum of the values of its digits |
| Experiment | A test or procedure in which results are observed |
| Expression | A mathematical phrase with numbers and/or variables and one or more operations |
| Factor | A number that can be multiplied by another number to get a product |
| Favorable outcomes | The desired outcomes of a probability experiment |
| Foot (plural: feet) (ft) | A customary unit of lenght; 1 foot = 12 inches |
| Formula | A general mathematical rule |
| Fraction | A number that names a part of a whole or a group |
| Frequency table | A table that uses tallies to show how many |
| Geometric pattern | A pattern made of figures |
| Greatest common factor (GCF) | The greatest number that is a factor of two or more whole numbers |
| Hour | A period of time equal to 60 minutes |
| Impossible | Describes an event that cannot happen; it has a probability of zero |
| Improper fraction | Fraction iwth a numerator that is greater than or equal to the denominator |
| Inch (in.) | A customary unit of length ; 12 inches = 1 foot |
| Intersecting | Describes lines or line segments that meet or cross |
| Inverse operations | Operations that undo each other, like addition and subtraction, or multiplication and division |
| Is equal to (=) | A symbol that shows that two quantities have the same value |
| Is greater that (>) | A symbol that shows that the first quantity is greater thatn the second quantity |
| Is less than (<) | A symbol that shows tha the first quantity is less than the second quantity |
| Isosceles triangle | A triangle with two equal sides and angles |
| Kilometer (km) | A metric unit of length 1 km = 1,000 m |
| Kite | A quadrilateral with two different pairs of connected sides that have the same length |
| Least common denominator (LCD) | The least common multiple of two or more denominators |
| Least common multiple (LCM) | The number that is a common multiple of two or more numbers |
| Length | The distance between two pints along a line |
| Like denominators | Fractions with the same denominators |
| Line | A straight path that goes in two directions without end |
| Line graph | A graph used to show changes in data over time |
| Line of symmetry | A line that divides a figure into two congruent halves |
| Line segment | A part of a line with two endpoints |
| Mean | The average of a data set |
| Meter (m) | A metric unit lf lengh; 1m = 100 cm |
| Mile | A customary unit of length; 1 mile = 5, 820 feet |
| Millimeter (mm) | A metric unit of length; 1mm = 1cm |
| Minuend | The number from which some are taken away in subtraction |
| Minute | A period of time equal to 60 seconds |
| Mixed number | A number that has a whole number part and a fraction part |
| Month | A period of time from 28 to 31 days |
| Multiple | The product of a number and any whole number |
| Numerator | The top number of a fraction that tells how many of the parts are being considered |
| Numerical expression | A mathematical phrase that includes numbers and operation symbols |
| Obtuse Angle | An angle that has a measure greater than 90 degrees and less than 180 degrees |
| Obtuse triangle | A triangle with one obtuse angle |
| Ordered pair | A pair of numbers used to locate a point on a coordinate grid |
| Order of operations | The sequence for carrying out operations |
| Origin | The point where the axes meet on a coordinate grid, named by the ordered pair (0,0) |
| Outcome | A possible result of an experiment |
| Parallel | Describes lines or line segments that stay the same distance apart and never meet |
| Parallelogram | A quadrilateral in which both pairs of opposite sides are parallel |
| Pattern | A group of shapes or numbers that repeat or change in a predictable manner |
| Percent (%) | Part of 100 or per hundred |
| Perimeter | The distance around a figure |
| Period | Groups of three numbers within a larger number; periods include ones, thousands, and millions |
| Perpendicular | Describes lines, line segments, or rays that intersect at right angles |
| Pictograph | A graph that shows data by using symbols |
| Place value | The valueof a digit based on its position ina number |
| Place - value chart | Separates numbers into groups of three places called periods |
| P.M. | The hours from 12 noon to 12 midnight |
| Point | An exact location or position |
| Possible outcomes | Any of the results that could happen in an experiment |
| Prediction | A statememt of what you think will happen |
| Prime number | A number greater than 1 that has only 1 and itself as factors |
| Probability | The chance that an event will occur |
| Product | The result of multiplying two or more numbers |
| Protractor | A tool used for measuring angles |
| Quadrilateral | A polygon with four sides and four angles |
| Quotient | The result of division |
| Ratio | A comparison of two quantities |
| Ray | A part of a line with an endpoint at one end that goes on forever int he other direction |
| Rectangle | A parallelogram with four right angles |
| Regular polygon | A plygon that has all sides equal in length and all angles equal in measure |
| Remainder | The number that is left over after division is complete |
| Rhombus | A parallelogram in which four sides have the same length |
| Right angle | An angle that forms a square corner; measures exactly 90 degrees |
| Round | To find the value of a number based on a given place |
| Sample space | The set of all possible outcomes of an experiment |
| Scalene triangle | A triangle with no sides equal |
| Second | A period of time; 1 minute= 60 seconds |
| Similar | Describes figures that have the same shape but may not have the same size |
| Simplest form | Form of a fraction whose numerator and denominator have only 1 as a common factor |
| Square | A rectangle in which four sides have the same length; it is also a rhombus with four right angles |
| Standard form | A way of writing a number that shows only its digits |
| Straight angle | An angle with a measure of 180 degrees |
| Subtrahend | The number that is taken away from the minuend in a subtractin problem |
| Sum | The result of adding two or more numbers |
| Survey | A way to collect data by asking people questions and recording their answers |
| Tally | A mark(l) that represents 1; each llll with a / over it represents 5 |
| Trapezoid | A quadrilateral wtih exactly one pair of parallel sides |
| Triangle | A polygon with 3 sides and 3 angles |
| Unlike denominators | Fractions with different denominators |
| Variable | A letter or symbol that represents an unknown value |
| Vertex(of an angle) | The point where the rays meet in an angle |
| Week | A period of time equal to 7 days |
| Whole numbers | The numbers 0, 1, 2,3, and so on |
| Word form | A way of writing numbers using words |
| X-axis | The left-right or horizontal axis on a coordinate grid |
| X-coordinate | The first number in an ordered pair |
| Y-axis | The up-down or vertical axis on a corrdinate grid |
| Y-Coordinate | The second number in an ordered pair |
| Yard (yd) | A customary unit of length; 1 yard - 3 feet, or 36 inches |
| Year | A period of time equal to 365 days |
