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# MATH

### GEOMERTY ANGLES

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

Acute angle | An angle with a measure greater than 0' and less than 90'. |

Acute Triangle | A Triangle having three acute angles. |

Adjacent angles | Angles that have the same vertex, share a common side, and do not overlap. |

Base | One of the two parallel congruent faces of a prism. |

Complementary angles | Two angles are Complementary if the sum of their measures are 90'. |

Cone | A three dimensional figure with one circular base connected by a curved surface to a single vertex. |

Congruent | Having the same measure. |

Congruent segments | Sides with the same length. |

Coplanar | Lines or points that lie in the same plane. |

Cross Section | The cross section of a solid and a plane. |

Cylinder | A three dimensional figure with two parallel congruent circular bases connected by a curved surface. |

Diagonal | A line segment that connects two nonconsecutive vertices. |

Edge | The line segment when two faces of a polyhedron intersect. |

Equilateral Triangle | A triangle having three congruent sides. |

Face | A flat surface of a polyhedron. |

Isoceles Triangle | A triangle having at least two congruent sides. |

Obtuse angle | Any angle that measures greater than 90' but less than 180'. |

Obtuse Triangle | A triangle having one obtuse angle. |

Plane | A two dimensional flat surface that extends in all directions. |

Polyhedron | A three dimensional figure with faces that are polygons. |

Prism | A polyhedron with two parallel congruent faces called bases. |

Pyramid | A polyhedron with one base that is a polygon and three or more triangular faces that meet at a common vertex. |

Right angle | An angle that measures exactly 90'. |

right Triangle | A triangle having one right angle. |

Scale model | A model used to represent objects that are to large or too small to be built at actual size. |

Scalene triangle | A triangle having no congruent sides. |

Straight Angle | An angle that measures exactly 180'. |

Supplementary angles | Two angles are supplementary if the sum of their measures is 180'. |

Triangle | A figure with three sides and three angles. |

Vertex | The point at the tip of the cone. |

Vertical angles | opposite angles formed by the intersection of two lines. Verticle angles are congruent. |

Created by:
shelbyartley