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# Chapter 7 (7th grade

### Geometric Figures

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

Two opposite angles formed by the intersection of two lines. | Vertical Angles |

Angles that have the same measurement | Congruent |

Two angles that share a common vertex, common side, and do not overlap | Adjacent |

Two angles that have a sum of 90 degrees | complementary |

Two angles that have a sum of 180 degrees | Supplementary |

All angles are acute in the triangle | Acute Triangle |

There is 1 right angles in the triangle | Right Triangle |

There is 1 obtuse angle in the triangle | Obtuse Triangles |

Less than 90 degreeAcute angle | Acute angle |

Exactly 90 degreesRight angle | Right angle |

Greater than 90 degreesObtuse angle | Obtuse angle |

A triangle with no congruent sides | Scalene triangle |

A triangle with two congruent sides | Isosceles triangle |

All sides are congruent in the triangle | Equalateral |

Sides with the same length | Congruent sides |

Representation of objects that are too big to draw in actual size | Scale drawing/model |

The ratio that compares the measure of the model to the measure of the actual object | Scale |

A scale written as a ratio with no units in simplest form | Scale factor |

A flat surface that goes on forever in all directions | plane |

Lines that fall on the same plane | coplanar |

Lines that will never intersect | parallel |

Line where two planes intersect | Edge |

Point where 3 or more planes intersect | vertex |

a flat surface | face |

a line segment whose endpoints are vertices that are neither adjacent nor on the same face | Diagnol |

A 3D figure with 2 parallel congruent circular bases connected by a curved surface | Cylander |

A 3D figure with one circular base connected by a curved side to one vertex | Cone |

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