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# Combined Sets

### Go Math Voc. Sets 1, 2, 3, 4

Term | Definition |
---|---|

a triangle with exactly three acute angles | acute triangle |

a pattern where the same value is added to the x-coordinate each time or y = x + a | additive pattern |

the number of square units needed to cover a surface. l x w = formula for a rectangle | area |

of equal measure; having the same size and same shape | congruent |

polygon with ten sides and ten angles | decagon |

the part of a fraction below the bar that tells how many equal parts there are | denominator |

answer to subtraction | difference |

a triangle with three equal sides and 3 acute 60 degree angles | equilateral triangle |

polygon with seven sides and seven angles | heptagon |

polygon with six sides and six angles | hexagon |

opposite operations, or ones that undo each other such as addition and subtraction or multiplication and division | inverse operations |

a triangle with two congruent sides, with all acute, one obtuse or right angle | isosceles triangle |

a pattern where the x-coordinate is multiplied by the same number each time or y = ax | multiplicative pattern |

polygon with nine sides and nine angles | nonagon |

the part of a fraction above the bar that tells the number of fractional pieces being used | numerator |

a triangle that has one obtuse angle (one angle larger than 90 degrees) | obtuse triangle |

polygon with eight sides and eight angles | octagon |

a pair of numbers used to locate a point on a coordinate plane (x,y) | ordered pair |

lines in the same plane that do not cross each other; they stay the same distance apart | parallel lines |

a quadrilateral where opposite sides are parallel and congruent | parallelogram |

distance around a figure | perimeter |

polygon with five sides and five angles | pentagon |

lines that cross and form a right (90 degree) angle | perpendicular lines |

a closed plane figure formed by three or more line segments | polygon |

the total when two or more factors are multiplied | product |

polygon with four sides and four angles | quadrilateral |

a quadrilateral that is a parallelogram and has four right angles | rectangle |

polygon with all sides and all angles congruent | regular polygon |

a quadrilateral that is a parallelogram and has four congruent sides | rhombus |

a triangle with one right (90 degree) angle | right triangle |

a triangle with no congruent sides, with all acute, one obtuse, or one right angle | scalene triangle |

a quadrilateral that is a parallelogram and has four right angles (rectangle) and four congruent sides (rhombus) | square |

answer to addition | sum |

a quadrilateral that only has one pair of parallel sides | trapezoid |

polygon with three sides and three angles | triangle |

the first number in an ordered pair; it tells how far left or right to move from (0,0) | x-coordinate |

the second number in an ordered pair; it tells how far up or down to move from (0,0) | y-coordinate |

base | the surface a solid object stands on |

composite number | a whole number with more than 2 factors |

cube | 3D figure that is a special rectangular prism with 6 square faces |

dimension | a measure of length in one direction |

divisible | when a number can be divided by another with a whole number quotient and no remainder |

factor | a number multiplied by another number to find a product |

prime number | a whole number greater than 1 with exactly two factors |

quotient | the size of each group or the number of groups when the dividend is divided by the divisor |

rectangular prism | 3D figure that has 6 rectangular faces, 12 edges, and 8 vertices |

volume | the measure of the space occupied by matter; l x w x h = rectangular prism |

whole numbers | the set of counting numbers and zero ( 0, 1, 2, 3, ...) |

base area | designated as a capital B in formulas and refers to the area of one of the bases in a solid |

equation | a mathematical sentence that shows two things are equal |

numerical expression | a mathematical phrase that uses only numbers and operation signs |

order of operations | the rules that say which calculation comes first when simplifying an expression (PEMDAS) |

associative property | different combinations do not affect sums 1 +(2 + 3) = (1 + 2) + 3, or products 2 x (3 x 4) = (2 x 3) x 4; it does not apply to subtraction or division |

axes | the horizontal, (x), and vertical (y), lines that act as reference points when plotting points on a coordinate grid |

commutative property | order does not affect sums 2 + 3 = 3 + 2, or products 4 x 5 = 5 x 4; it does not apply to subtraction or division |

coordinate grid | a two-dimensional plane on which to plot points, lines, and curves |

distributive property | in multiplication a factor can be broken into pieces; 4 x 56 - 4 x 50 + 4 x 6 |

expanded form | the representation of a number as a sum of place values like 57 = 5 x 10 + 7 x 1 |

hundredths | second decimal place to the right |

origin | the starting point where the axes of a coordinate plane intersect; (0,0) |

tenths | first decimal place to the right |

thousandths | third decimal place to the right |

x - axis | the horizontal (left to right) line on a coordinate plane that runs through zero |

y - axis | the vertical (up and down) line on a coordinate plane that runs through zero |

expanded notation | the representation of a number as a product of the digit and its place value like 57 = 5 x 10 + 7 x 1 |