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# gr. 5 PSSA Vocab

Question | Answer |
---|---|

A number that is being added | addend |

an angle that measures 90 degrees | right angle |

an angle that measures less than 90 degrees | acute angle |

an angle that measures greater than 90 degrees | obtuse angle |

a straight path extending in both directions with no end points | line |

part of a line with 2 end points and a fixed length | line segment |

part of a line that has one endpoint and continues in the other direction forever | ray |

the place where two or more lines, line segments, or rays cross | intersection |

lines that are always the same distance apart and never intersect | parallel |

two lines, line segments, or rays that intersect to form right angles | perpendicular |

a flat surface that extends in all directions | plane |

figures with the same size and shape | congruent |

figures with the same shape, but not necessarily the same size | similar |

a triangle that has one 90 degree angle | right triangle |

a flat figure with 4 or more straight sides that is closed | polygon |

a polygon with 4 sides | quadrilateral |

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

a parallelogram with 4 equal sides | rhombus |

a quadrilateral with one set of parallel sides | trapezoid |

a polygon with 5 sides | pentagon |

a polygon with 6 sides | hexagon |

a polygon with 8 sides | octagon |

a line that divides a figure into 2 halves that are mirror images of each other | line of symmetry |

moving a figure without turning or flipping it (also called a slide) | translation |

moving a figure to show its mirror image (also called a flip) | reflection |

moving a figure to a new position by slide, flip, or turn | transformation |

moving a figure by turning it around a fixed point | rotation |

a three-dimensional shape with length, width, and height | solid figure |

the line segment where 2 faces of a solid figure meet | edge |

a flat surface that is one side of a solid figure | face |

a point where lines, rays, sides, or edges meet | vertex |

a rectangular solid with six congruent square faces | cube |

a solid figure with a polygon base and triangular sides that meet at a single point | pyramid |

a solid figure with 2 circular bases that are parallel and congruent | cylinder |

a solid figure that has a circular base and one vertex | cone |

a solid figure that has all points the same distance from the center (like a ball) | sphere |

any of the counting numbers | whole number |

a number or any combination of numbers and symbols that shows a mathematical relationship without an equal sign or answer | expression |

having the same value | equivalent |

a math sentence showing that one expression equals another | equation |

a math sentence that contains a symbol showing that the terms on either side are unequal | inequality |

a math equation with numbers | number sentence |

a set of addition/subtraction or multiplication/division equations that use the same numbers | fact family |

a situation in which a rule causes each "in value" to have a unique "out value" | function |

a whole number that has only two factors: 1 and itself | prime number |

a whole number that has more than two factors | composite number |

a number that divides evenly into another number | factor |

the product of a number multiplied by another number | multiple |

the smallest number (other than 0) that is a common multiple of two or more numbers | least common multiple |

a way to write numbers that shows the value of each digit | expanded notation |

the number found by dividing the sum of a group of numbers by the number of addends | mean |

the number that occurs most often in a set of data | mode |

the middle number in a list of ordered numbers | median |

the difference between the biggest and smallest numbers in a group | range |

the distance around a figure | perimeter |

the distance around a circle | circumference |

the measure in square units of the inside of a plane figure | area |

the amount of space in cubic units that a solid figure can hold | volume |

a group of items in which the order doesn't matter | combinations |

a rectangular arrangement of objects in equal rows and columns | array |

a table that uses tally marks to record data | tally chart |

a graph that uses pictures to show and compare information | pictograph |

a pair of numbers used to locate a point on a grid | ordered pair |

time shown on a clock or watch with hour and minute hands | analog |