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# 2013-7thMathPTVocab4

### SHMS 7th Grade Math Powertime Vocab 4

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

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. |

Parallel Lines | Two lines that lie in the same plane and do not intersect. AB || CD denotes this relationship between line AB and line CD. |

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. |

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. |

Simulation | A technique used for answering real-world questions or making decisions in complex situations where an element of chance is involved. |

Theoretical Probability | The mathematical calculation that an event will happen in theory. It is based on the structure of the processes and its outcomes. |

Tree diagram | A tree-shaped diagram that illustrates sequentially the possible outcomes of a given event. |

Chance Process | The repeated observations of random outcomes of a given event. |

Compound Event | Any event which consists of more than one outcome. |

Event | Any possible outcome of an experiment in probability. Any collection of outcomes of an experiment. Formally, it is any subset of the sample space. |

Experimental Probability | The ratio of the number of times an outcome occurs to the total amount of trials performed. |

Independent events | Two events when the occurrence of one of the events gives us no information about whether or not the other event will occur; that is, the events have no influence on each other. |

Created by:
hbogue