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# 3rd TAKS Math Vocab

### Vocabulary Terms for 3rd Grade Math

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

How do I find the peRIMeter of a shape? | Measure the OUTSIDE of each side of the shape and total all of these measurements. |

Congruent | Two shapes having the SAME SIZE and SAME SHAPE. |

Hexagon | A polygon that has six sides |

sum | The answer to addition |

difference | The answer to subtraction |

product | The answer to multiplication |

quotient | The answer to division |

place value | The value given to a digit by its place in a number. |

symmetry | An object has line symmetry if one side is the MIRROR image of the other side. |

octagon | a polygon that has eight sides |

polygon | A closed plane figure formed using line segments that meet only at their endpoints. |

array | an arrangement of objects in rows and columns |

area | The number of square units needed to cover the INSIDE of a region or plane figure. |

Round | To change the value of a number to one that is easier to work with. About, estimate |

Multiplication | Repeated Addition |

Division | Repeated Subtraction |

acute angle | an angle that is greater than 0 degrees, but less than 90 degrees. |

right angle | an angle that is exactly 90 degrees |

obtuse | an angle that is more than 90 degrees,but less than 180 degrees. |

probability | the likelihood that an event will occur |

straight angle | an angle that is exactly 180 degrees. A straight set of points that extend in opposite directions without ending. |

quadrilateral | a four-sided polygon |

parallel lines | two or more lines that have no points in common, i.e. they do not cross at any point. |

parallelogram | A quadrilateral with four sides in which each pair of opposite sides are parallel and equal in length. |

digit | a symbol used to write numbers |

expanded notation | a way of writing a number that shows the sum of the value of the digits |

equal to | having the same value |

standard form | the usual way of writing a number that shows only its digits, no words |

pattern | a series of numbers of figures that follows a rule |

array | Objects or symbols displayed in rows of the same length and columns of the same length. The length of a row might be different from the length of a column. |

pentagon | a polygon with five sides |

pictograph | A graph that compares data by using picture symbols. |

bar graph | A graph that compares data by using bars of different lengths or heights to show the values. |

capacity | The amount a container can hold, measured in units of dry or liquid measure. |

volume | The number of cubic units needed to fill a 3-dimensional figure or solid figure. |

vertex (vertices) | A POINT(s) of a 2- or 3-dimensional figure where two or more edges of the figure meet |

edge | The LINE segment where two faces of a solid figure MEET. |

estimate | A number close to an exact value. An estimate indicates about how much. |

even number | A number that ends with 0, 2, 4, 6, or 8. |

cylinder | A 3-dimensional figure having two circular bases and a curved surface connecting the two bases. |

ordered pair | A pair of numbers that gives the location of a point on a map or grid. |

trapezoid | A quadrilateral with exactly one pair of parallel sides. |

square | A rectangle with four congruent sides. |

sphere | A 3-dimensional figure that has the shape of a round ball. |

rectangle | A quadrilateral with four right angles; opposite sides are equal and parallel. |

rhombus | A parallelogram with four sides of the same length. |

quarter hour | One-fourth of an hour or 15 minutes. |

fraction | A number that represents part of a whole or part of a set. |

odd number | A number that is not divisible by 2, such a number has 1, 3, 5, 7, or 9 in the ones place. |

numerator | The number above the bar in a fraction; the part of the fraction that tells how many of the equal parts are being used. |

denominator | The bottom number in a fraction. This number represents the TOTAL PARTS. |

factor | A number that divides a whole number evenly. Also a number that is multiplied by another number. |

equivalent | having the same value |

face | The FLAT PART of a 3-dimensional figure. Example: A square is a face of a cube. |

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