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# 8th: PSSA Vocabulary

### Use the flashcards to review important math vocabulary.

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

Acute triangle | A triangle that has each angle measuring less than 90 degrees. |

Adjacent angles | Angles that share a common side and common vertex and do not overlap. |

Alternate exterior angles | A pair of angles located outside a set of parallel lines and on opposite sides of the transversal. |

Alternate interior angles | A pair of angles located between a set of parallel lines and on opposite sides of the transversal. |

Box-and-whisker plot | A graphic method for showing a summary of data using median, quartiles and extremes of data. |

Complementary angles | Two angles whose measures, when added together, equal 90 degrees. Compound event: An event made up of two or more simple events. |

Coordinate plane | graph |

Ordered pairs | Points on a coordinate plane. (x,y) |

Origin | The point at which the two axes intersect has the coordinates (0,0). |

Corresponding angles | Angles in the same relative position in similar or congruent figures. |

Equilateral triangle | A triangle whose sides are all the same length. |

Experimental probability | A statement of probability based on the results of a series of trials. |

Independent events | Two events in which the outcome of one event does not affect the outcome of the other event. |

Isosceles triangle | A triangle that has exactly two congruent sides. |

Linear function | An equation whose graph in a coordinate plane is a straight line. |

Net | A two-dimensional shape that can be folded to create a three-dimensional figure. |

Obtuse triangle | A triangle with one angle that measures more than 90 degrees. |

Order of operations | Rules describing what sequence to use in evaluating expressions; also known as PEMDAS |

Perfect square | The product of an integer multiplied by itself (e.g., 121 is a perfect square because 11x11=121). |

Permutation | Possible orders, or arrangements of a set of items. |

Prism | A three-dimensional solid that has two congruent and parallel faces that are polygons. The remaining faces are rectangles. |

Proportion | An equation showing that two ratios are equal. |

Pythagorean theorem | A formula for finding the length of a side of a right triangle when the lengths of two sides are given. |

Scalene triangle | A triangle with no congruent sides. |

Scatterplot | A graph with points plotted to show a relationship between two variables. |

Scientific notation | A form of writing very large or very small numbers using a number greater than or equal to 1 and less than 10 multiplied by a power of 10 (e.g., 4.7 x 109 = 4,700,000,000). |

Stem-and-leaf plot | A data display that shows groups of data arranged by place value. |

Supplementary angles | Two angles whose measures, when added together, equal 180 degrees. |

Surface area | The sum of the areas of all of the faces of a three-dimensional figure. |

Theoretical probability | A statement of the probability of an event without doing an experiment or analyzing data. |

Vertical angles | A pair of opposite congruent angles formed when two lines intersect. |

Created by:
tsuprick