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# Geo Chapter 4&6 Voc

### Geometry

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

A triangle with no congruent sides | Scalene Triangle |

A triangle with at least two congruent sides | Isosceles Triangle |

A triangle with three congruent sides | Equilateral Triangle |

A triangle with three acute angles | Acute Triangle |

A triangle with one right angle | Right Triangle |

A triangle with one obtuse angle | Obtuse Triangle |

A triangle with three congruent angles | Equilateral Triangle |

The original, inside angles formed by a polygon | Interior Angles |

The angles that form linear pairs with the interior angles | Exterior Angles |

Adding a line, segment, or ray to a given diagram in order to complete a proof | Auxiliary Lines |

A statement that can be easily proven using the theorem | Corollary to a Theorem |

Two geometric figures that have exactly the same size and shape | Congruent Figures |

A pair of sides or angles that have the same relative position in two congruent or similar figures. | Corresponding Parts |

The sides adjacent to the right angle | Leg of a Right Triangle |

The side opposite the right angle | Hypotenuse |

Uses arrows to show the flow of a logical argument | Flow Proof |

Two congruent sides of an isosceles triangle | Legs |

The angle formed by the two legs of an isosceles triangle | Vertex Angle |

The third side of an isosceles triangle | Base |

The two angles adjacent to the base side | Base Angles |

An operation that moves or changes a geometric figure in some way to produce a new figure | Transformation |

The new figure by a transformation | Image |

A transformation that moves every point of a figure the same distance in the same direction | Translation |

A transformation that uses a line of reflection to create a mirror image of the original figure | Reflection |

A transformation that turns a figure about a fixed point | Rotation |

Changes the position of the figure without changing its size or shape | Congruence Transformation |

he line used to reflect an object | Line of Reflection |

The point that a figure is turned around when completing a rotation | Center of Rotation |

Rays drawn from the center of rotation to a point and its image | Angle of Rotation |

A comparison of two numbers using division | Ratio |

An equation that states two ratios are equal | Proportion |

The middle terms of a proportion | Means |

The first and last term of a proportion | Extremes |

A drawing that is the same shape as the object it represents | Scale Drawing |

A ratio that describes how the dimensions in a scale drawing are related to the actual dimensions of the object | Scale |

Two polygons such that their corresponding angles are congruent and the lengths of corresponding sides are proportional | Similar Polygons |

The ratio of the lengths of two corresponding sides of two similar polygons | Scale Factor |

A transformation that stretches or shrinks a figure to create a similar figure | Dilation |

The fixed point about which the figure is enlarged or reduced | Center of Dilation |

The ratio of a side length of the image to the corresponding side lengths of the original figure | Scale Factor of a Dilation |

A dilation with a scale factor between zero and one | Reduction |

A dilation with a scale factor greater than one | Enlargement |

Created by:
warnockj