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# 2012-7thMathPTVocab4

### South Habersham Middle School 7th Grade Math Powertime Vocabulary Unit 4

Word | Definition |
---|---|

Adjacent Angle | Angles in the same plane that have a common vertex and a common side, but no common interior points. |

Circumference | The distance around a circle. |

Complementary Angle | Two angles whose sum is 90 degrees. |

Congruent | Having the same size, shape and measure. |

Cross-section | A plane figure obtained by slicing a solid with a plane. |

Irregular Polygon | A polygon with sides not equal and/or angles not equal. |

Pi | The relationship of the circle’s circumference to its diameter, when used in calculations. It is typically approximated as 3.14; the relationship between the circumference (C) and diameter (d), c/d or 3.14 |

Regular Polygon | A polygon with all sides equal (equilateral) and all angles equal (equiangular). |

Supplementary Angle | Two angles whose sum is 180 degrees. |

Vertical Angles | Two nonadjacent angles formed by intersecting lines or segments. Also called opposite angles. |

Probability | A measure of the likelihood of an event. It is the ratio of the number of ways a certain event can occur to the number of possible outcomes. |

Probability Model | It provides a probability for each possible non-overlapping outcome for a change process so that the total probability over all such outcomes is unity. This can be either theoretical or experimental. |

Relative Frequency of Outcomes | Experimental Probability |

Sample space | All possible outcomes of a given experiment. |

Simple Event | Any event which consists of a single outcome in the sample space. It can be represented by a single branch of a tree diagram. |

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hbogue