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Fourth Grade Vocabulary acute angle angle whose measure is greater than 0º and less than 90º A B C acute triangle triangle that has three acute angles Cobb County 4th Grade 1 2010-2011 angle two rays or line segments that share the same endpoint area model 33 x 6 198 associative property grouping numbers in different ways resulting with the same product or sum (32 + 48) + 56 = 32 + (48 + 56) Cobb County 4th Grade 2 2010-2011 commutative property two or more numbers added or multiplied in any order resulting in the same sum or product 36 + 48 + 52 = 36 + 52 + 48 coordinate system method for locating points using a plane formed by two intersecting and perpendicular number lines called axes cube rectangular prism with six square faces Cobb County 4th Grade 3 2010-2011 cylinder 3-dimensional object with two parallel circular bases data information gathered; facts or figures from which conclusions are drawn decimal 3.57 number with one or more digits to the 3.3cyl right of the decimal point inder Cobb County 4th Grade 4 2010-2011 $5.65 decimal point 3.57 symbol used to separate dollars and cents in money and the ones place from the tenths place in decimals degree unit used for measuring angles and temperatures denominator 3 5 lower number of a fraction which tells how many parts are in the whole or in the group Cobb County 4th Grade 5 2010-2011 diagonal line line segment joining two non-adjacent vertices of a polygon distributive property 25 x 43 (20 x 40) + (20 x 3) + (5 x 40) + (5 x 3) 3 X 8 + 3 X 4 = 3 X (8 + 4) 567 dividend the number that is to be divided in a division problem 21 ÷ 7 = 3 Cobb County 4th Grade 6 21 ÷ 7 = 3 2010-2011 divisor 7 the number that divides the dividend 21 ÷ 7 = 3 edges line segments where two or more faces of a solid figure meet equilateral triangle triangle that has 3 sides equal in length and 3 angles equal in size Cobb County 4th Grade 7 2010-2011 equivalent fraction two or more fractions that name the same amount = estimate find out about how many or how much 36 is about 40 = 1+9 evaluate = 10 find the value of a mathematical expression Cobb County 4th Grade 8 2010-2011 expanded form way to write numbers by showing the value of each digit 3000 + 400 + 20 + 7 = 3,427 expression + 23 – 14 mathematical phrase (part of the number sentence) that combines numbers and operation signs but does not have an equal sign (2+4)-5 face polygons that form flat surfaces on a solid figure Cobb County 4th Grade 9 2010-2011 factor numbers that are multiplied together to find s a product 4 X 6 = 24 full rotation 360°movement of a figure around a fixed point gram metric unit for measuring weight (mass) Cobb County 4th Grade 10 2010-2011 half rotation 180°movement of a figure around a fixed point 37.76 hundredths one hundred equal parts 1 100 improper fraction fraction in which the numerator is greater than or equal to the denominator Cobb County 4th Grade 11 2010-2011 interpret give the meaning of or explain isosceles triangle triangle with 2 sides equal in length and 2 angles equal in size. kilogram metric unit for measuring weight (mass) Cobb County 4th Grade 12 2010-2011 like denominators fractions with denominators that are the same 2 5 6 6 line straight path of points that has no beginning or end line graph graph that uses a line to show how data changes over a period of time Cobb County 4th Grade 13 2010-2011 line plot graph that uses symbols above a number line to represent data line segment A G part of a line that includes two endpoints 3 3 4 6 7 Cobb County 4th Grade median middle score (or scores) when a set of scores are written in order of size 14 2010-2011 million 3,000,000 six places to the left of the ones place mixed fraction 4 3 3 3 4 6 7 Cobb County 4th Grade an amount given as a whole number and a fraction mode the score that occurs most often in a set 3 of scores 15 2010-2011 multiple number that is the product of a given number and a whole number 7 X 8 = 56 56 is a multiple of 7 and also 8 net flat pattern that can be used to make a three-dimensional object numerator the top number of a fraction, which tells how many parts are being counted out of the total number of equal parts Cobb County 4th Grade 16 2010-2011 obtuse angle angle whose measure is greater than 90° and less than 180° obtuse triangle triangle that has one obtuse angle ordered pair pair of numbers used to locate a point on a coordinate grid (2, 4) Cobb County 4th Grade 17 2010-2011 ounce standard unit for measuring weight parallel lines in the same plane that never intersect and are always the same distance apart parallelogram quadrilateral whose opposite sides are parallel Cobb County 4th Grade 18 2010-2011 partial product 38 X 9 54(6X9) 270(30X8) 324 products when the ones, tens and hundreds are multiplied separately perpendicular two lines or line segments that intersect to form right angles pictograph graph that uses symbols to show data Cobb County 4th Grade 19 Sam Sue Key = 2 cats 2010-2011 place value value of a digit according to its place in a number 7,382 the value of 7 = 7,000 plane flat surface that extends indefinitely in all directions plane figure two-dimensional shape Cobb County 4th Grade 20 2010-2011 point an exact location in space polygon closed plane figure formed by three or more line segments and angles pound customary unit of weight 1 lb = 16 oz Cobb County 4th Grade 21 2010-2011 prism rectangular prism triangular prism product name given to the answer in a multiplication problem proper fraction fraction where the numerator is less than the denominator or Cobb County 4th Grade 22 or 2010-2011 protractor tool for measuring the size of an angle pyramid has one base which gives the pyramid its name, all other faces are triangles quotient 28 ÷ 2 = 14 name given to the answer in a division problem Cobb County 4th Grade 23 2010-2011 range difference between the least and greatest value in a set of data 9 2, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11 ray line which has a definite starting point but no end rectangular prism solid figure in which all six faces are rectangles Cobb County 4th Grade 24 2010-2011 regular polygon polygon with all sides and angles congruent remainder amount left over when a number cannot be divided equally 43 ÷ 8 = 5 r 3 rhombus parallelogram with all four sides equal in length Cobb County 4th Grade 25 2010-2011 right angle angle which forms a square corner; has a measure of 90° right triangle triangle with one 90° angle rotation movement of a figure to a new position by turning it around a vertex or point of rotation Cobb County 4th Grade 26 2010-2011 scalene triangle triangle in which no sides are equal in length; no angles are equal in size solid figure 3-dimensional figure standard form 352 4,672 way to write numbers using the digits 0 - 9 Cobb County 4th Grade 27 2010-2011 straight angle angle that measures 180° + = __ symbol word, picture, or number used instead of words tenths 546.6 ten equal parts Cobb County 4th Grade 28 1 10 2010-2011 ton customary unit used to measure weight 1 T = 2,000 lbs trapezoid quadrilateral with exactly one pair of parallel lines trend changes in data over time Cobb County 4th Grade 29 2010-2011 Venn diagram uses circles to show relationships among sets vertex/vertices point at which 2 or more straight lines meet weight how heavy or light an object is in numbers Cobb County 4th Grade 30 2010-2011 x-axis x horizontal line in a coordinate system or on a coordinate plane y-axis y vertical line in a coordinate system or on a coordinate plane Cobb County 4th Grade 31 2010-2011