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# Chapter 5 part A

### Chapter 5 Review

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

Acute Angle | An angle that measures lesss than 90 degrees |

Acute Triangle | A triangle that has three |

Angle | A figure formatted by two rays with a common end point called the vertex. |

Center of rotation | The point about which the figure is rotated |

Complementary Angles | Two angles whose measures add at 90 degrees |

Congruent | Having the same size and shape. |

Correspondence | The relationship between two or more objects that are matched. |

Equilateral Triangle | a triangle with three congruent sides. |

Image | A figure resulting from a transformation. |

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

Line | A straight path that extends without an end in opposite directions |

Line of symmetry | The imaginary mirror in line of symmetry. |

Obtuse angle | An angle that is measured and is greater than 90 but less than 180. |

Obtuse triangle | A triangle containing one obtuse angle. |

Parallel lines | Lines in a plane that do not intersect. |

Parallelogram | Quadrilateral with two pair of parallel sides |

Perpendicular lines | Lines that intersect two parallel lines |

Plane | A flat surface that extends forever |

Point | An exact location in space |

Polygon | A closed plane figure formed by three or more lines segments that intersect only at their end points (vertices). |

Ray | A part of a line that starts at one end point and it extends forever |

Rectangle | a parallel line with four right angles. |

Reflection | A transformation of a figure that flips the figure across a line. |

Regular polygon | Polygon with congruent sides and angles. |

Rhombus | a parallelogram with all sides congruent. |

Right angle | An angle that measures 90 degrees |

Right triangle | A triangle containing a right angle. |

Rise | a vertical change when the slope of a line is expressed as a ratio “rise over run”. |

Rotation | A transformation in which a figure is turned around a point. |

Rotational Symmetry | A figure has rotational symmetry if it can be rotated less than 360 degrees around a central point and concide with original figure. |

Run | The horizontal change when the slope of a line is expressed as the ratio "rise over run" |

Scalene Triangle | A triangle with no congruent sides |

Segment | A part of a line between two end points |

Slope | A measure of the steepness of a line on a graph; the rise divided by the run |

Square | A rectanhgle with four congruent sides |

Supplementary angles | Two angles who measures have a sum of 180 degrees |

Tessellation | A repeating pattern of plane figures that completely cover a plane with no gaps or overlaps |

Transformation | A change in the size or postion in a figure |

Translation | A movement of a figure along a straight line |

Transversal | A line that intersects two or more lines |

Trapezoid | A quadriladeral with exactly 1 pair of parellel sides |

Triangle Sum Theorem | The theorem that states the measures of the angles in a triangle add up to 180 degrees |

Vertical angles | A pair of opposite congruent angles formed by intersecting lines |

Created by:
smath77