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## square

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**square**A rectangle whose sides are all the same length.**square array**A rectangular array with the same number of rows as columns.**1**square number 4 9 2 16 A number that is the product of a whole number multiplied by itself; a whole number to the second power. 35 = 35 x 35 = 1225**square of a number**The product of number and itself.**square pyramid**A pyramid with a square base.**square root of a number**320= 2*2*2*2*2*2*5 320= 4*4*4*5 or320=16*4*5 √320=8√5 The square root of a number n is a number which, when multiplied by itself, results in the number n.**square units**7 square units The units used to measure area.**587 = 500 + 60 + 7**standard notation expanded notation standard notation The most familiar way of representing whole numbers, integers, and decimals by writing digits in specified place.**standard unit**A uniform unit of measure.**step graph**A graph that looks like steps.**stem-and-leaf plot**A display of data in which digits with larger place values are named as stems, and digits with smaller place values are names as leaves.**straightedge**A tool used to draw a line segment.**7**- 3 minuend subtraction subtrahend difference 4 A math operation based on taking away one quantity from another or decreasing quantity.**7**- 3 minuend subtrahend subtrahend difference 4 The number being subtracted.**addends**sum sum 14 + 15 + 6 = 35 The answer to an adding problem.**supplementary angels**Two angels whose measures total 180 . o**survey**Collection data for graphing and analysis.**symmetry**The property of exact balance in a figure; having the same size and shape across a dividing line.**symmetry**The matching of two halves of a shape.**tally marks**11 5 10 Marks used to keep track of a count.**tally chart**Tally charts are used to organize and display data. A tally chart is a table that shows how many times each value appears.**tangent**Intersecting at exactly one point.**template**A pattern used as a guide in making something accurately.**59**270 tens The place-value position equal to ten times the unit value.**term**In an algebraic expression or equation, a number or a product of a number and one or more variables.**terminating decimal**.333… 1 3 = .30 Decimals that continue a pattern without end.**tessellation**An arrangement of closed shapes that covers a surface completely without overlaps or gaps.**tetrahedron**A polyhedron with four faces.**theorem**A mathematical statement that can be proven to be true (or sometimes, a statement that is proposed and needs to be proven).**3-dimensional (3-D)**Objects with thickness,length and width.**3-dimensional (3-D)**Objects that are not completely within a single flat surface.**tile**A shape used in a tessellation. If only one shape is repeated in a tessellation, the tessellation is called a same-tile tessellation.**tiling**An arrangement of closed shapes that covers a surface completely without overlaps or gaps.**time line**A number line showing years, days,and events in a sequence.**tool kit**A bag containing things needed in math.**top-heavy fraction**A fraction that names a number greater than or equal to 1; a fraction whose numerator is equal to or greater than its denominator.**trade-first subtraction**Subtraction procedure in which all necessary trades are done before any subtractions are carried out.**trapezoid**A quadrilateral that has one pair of parallel sides. No two sides need to be the same length.**translation**The motion of “sliding” an object or picture along a straight line.**transparent mirror**A mirror with a front and back face that has a recessed edge used for drawing lines of symmetry.**triangle**A 3-sided polygon.**triangular prism**A prism whose bases are triangles.**triangular pyramid**A pyramid whose bases (faces) are triangles.**One trillion written**in number form is 1,000,000,000,000 in exponential form 10 trillion A digit(s) followed by 12 whole-number places. 12**triple**Three times an amount.**turn**Rotation.**2 x 3**3 x 2 6 + 3 3 + 6 turn-around facts 234 x 5 5 x 234 143 + 23 23 + 143 A pair of add or multiplication facts in which the order of the addends or the factors is reversed.**3 and 5 are twin primes,**because they are separated by the composite number 4. twin primes Two prime numbers that are separated by just one composite number.**2-dimensional (2-D)**Objects completely within a flat surface; objects with length and width, but no thickness.**24 children**unit 27 ducks 1 kg 3 o’clock 30 cents A label, descriptive word, or unit of measure used to put a number in context.