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# Math unit 4

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

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

Angle | A shape, formed by two lines or rays diverging from a common point |

Base | the number of different digits or combination of digits and letters that a system of counting uses to represent numbers |

Circumference | The distance around the edge of a circle |

Complementary | when two angles add up to 90° |

Diameter | any straight line segment that passes through the center of the circle and whose endpoints lie on the circle |

Dimensions | A measurement of length in one direction |

Face | each flat surface of any geometric solid |

Inscribed | drawing one shape inside another so that it just touches |

Line | a line of points that extends infinitely in two directions |

Line Segment | a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints |

Parallel | two lines that are always the same distance apart and never touch |

Perpendicular | at right angles |

Pi (TT) | is a number - approximately 3.142. It is the circumference of any circle divided by its diameter |

Plane Sections | the area created by a plane cutting through a solid |

Pyramid | a polyhedron formed by connecting a polygonal base and a point |

Radius | any of the line segments from its center to its perimeter |

Ray | A portion of a line which starts at a point and goes off in a particular direction to infinity |

Right Rectangular Prism | a rectangular prism has a rectangle as its base, and vertical sides perpendicular to the base |

Right Rectangular Pyramid | is a three-dimensional object with a rectangle for a base and a triangular face corresponding to each side of the base |

Supplementary | when two angles add up to 180 degrees |

Vertical | a line which runs from up and down the page |