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# Geometry

### For math

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

Circumference | C=2pi r or C=pi d |

Pi | ≈3.14 or ≈22/7 |

Triangle | Polygons with three sides, three angles, three vertices |

Equilateral | All sides congruent |

Isoscles | At lest two side congruent |

Scalene | No sides congruent |

Equangular | All angles congruent |

Point | A geometric object that has no dimensions, only a location |

Plane | at surface that extends endlessly in all directions; two dimentional |

Space | the set of all points;three dimentional |

Line | A set of points along a straight path having no endpoints |

Line segment | Pair of a line that has two endpoints |

Ray | Part of a line that only has one endpoint |

Angle | two rays jointed together with a common endpoint; the two rays are called the sides of an angle |

Vertex | The common endpoint for an angle |

Intersecting lines | Lines that have just one point in common |

Supplementary angles | Two angles whose measure adds up to 180 degrees; any two right angles are supplementary |

Complementary angles | Two angles whose measure adds up to 90 degrees |

Transversal | A line that intersects two other lines |

Adjacent angles | Two angles that share a side ( or ray ) and a vetex |

Skew lines | Lines that are not in the same plane and do not intersect |

Equilateral polygon | All sides congruent |

Equiangular Polygon | All angles congruent |

Parallelogram | Quadrilaterral with both pairs of opposite sides parallel |

Corresponding angles | Two lines intersected by a transversal form corresponding pairs of angles; if the lines are parallel the corresponding pairs of angles are congruent |

n- gon | 180(n-2) |

area of a circle | A=pi r² |

square root | ex.square root of 81=9 |

square | ex. 9 squared or 9² 81 |

Created by:
alanjohnson2004