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Angle – a figure formed by two rays that have the same endpoint Acute Angle – an angle that is open less than a right angle Obtuse Angle – an angle that is open more than a right angle Right Angle – an angle that forms a square corner Approximate or Approximately – Estimate or about Area Model – a model for multiplication in which the length and width represent the product. Benchmark Fractions – fractions that are commonly used for estimation Decimal – point used to separate ones from tenths and hundredths. Common Denominator – a denominator that is the same in two or more fractions Division – mathematical operation that tells how many equal groups there are or how many are in each group Comparisons or compare – to examine two or more shapes, equations or values, in order to note similarities or differences Composite number - a whole number greater than one that has more than 2 factors Convert or conversion – an exchange from one unit of measure to another Customary Unit – unit of measurement used in the United States Decompose – The process of separating numbers into their components (to divide a number into smaller parts). To take numbers apart in a problem to make it easier to understand and solve. Remainder – the number that remains after division is complete Place Value – the value given to the place a digit has in a number Degree – the unit of measure for angles Distance – a numerical description of how far apart objects are Dividend – the number being divided End Point – the point at which a line segment or ray terminates Equal To – to be equivalent to; have the same value Mixed Number – a number with a whole number part and a fraction part Improper Fractions – a fraction in which the numerator is equal to or greater than the denominator Equilateral Triangle – a triangle in which all the sides are equal Fraction – a symbol that is used to describe one or more parts of a whole that is divided into equal parts Greater than - “Bigger Than” or > It refers to where a number is located on the number line. If you have two numbers that are NOT equal and you see where they are on the number line, then the BIGGER of the two numbers, the one to the RIGHT, is ______ the other. Hundreds – a cardinal number, 10 times 10, refers to the 3rd position to the left of the decimal Perpendicular Lines – two lines that intersect to form square corners or right angles Parallel Lines – two lines that never intersect Isosceles triangle – a triangle that has two sides of equal length Less than - “Smaller Than” or < It refers to where a number is located on the number line. If you have two numbers that are NOT equal and you see where they are on the number line, then the SMALLER of the two numbers, the one to the LEFT, is _____ the other. Multiple – product of any two whole numbers Vertex/Vertices - The common endpoint of the two rays in an angle; the point at which three or more edges meet in a solid figure; the point of a cone. Divisor – the number by which a number is divided Quotient – the answer to a division problem Line – a straight path of points that goes on forever in two directions Line Segment – a part of a line that has two endpoints Line of Symmetry - A figure has ____ when it can be folded along one or more lines that create congruent parts, which can fit on top of each other exactly. Million – a cardinal number, 1000 times 1000, the position of the 7th digit to the left of the decimal Money Change - The amount of money you get back when you purchase something and it costs less than the amount of money you gave the clerk. Prime Number – any number greater than 1 that has exactly two factors, itself and 1 Protractor – a device used to measure and draw angles Ray – part of a line that has one endpoint and extends forever in one direction Right Triangle – a triangle in which one angle is a right angle Round - A process that determines which multiple of 10, 100, 1000, etc., a number is closest to. Replacing a number with a number that tells ABOUT how many or how much. Scalene Triangle – a triangle in which no sides have the same length Tenths - One out of ten equal parts of a whole. The position of the 1st digit to the right of the decimal point. Unit Fraction - A rational number written as a fraction where the numerator is one and the denominator is a positive integer.