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# Unit 6 - Mr. Hunt

### 7th grade Geometry

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

side | line segments that make up a polygon |

angle | two rays or lines that share a common point or vertex |

congruent | equal in size |

opposite | directly across from |

parallel | two lines that would never intersect when headed in both directions forever |

perpendicular | two lines that intersect at a 90 degree angle |

base | the line on a shape that is perpendicular to the height |

height | the line on a shape that is perpendicular to the base |

circumference | the perimeter of a circle |

perimeter | the distance around the outside of the shape, the sum of the length of all the shape's sides |

area | the space inside a shape |

equidistant | to have equal distance from a given point |

Pi | the ratio of the diameter of a circle to its circumference, ~ 3.14 |

straight angle | a 180 degree angle |

right angle | a 90 degree angle |

obtuse angle | an angle greater than 90 degrees |

acute angle | an angle less than 90 degrees |

vertical angles | the congruent opposite angles that are formed when two lines intersect |

adjacent angles | two angles that share a common side, line, or ray |

complimentary angles | two angles that sum to 90 degrees |

supplementary angles | two angles that sum to 180 degrees |

Formula for Circumference | C = Pi(d) |

Formula for diameter of a circle | d = 2r |

Formula for radius of a circle | r = d/2 |

Formula for area of a circle | A = Pi(r^2) |

Formula for area of a rectangle | A = l(w) or A = b(h) |

Formula for area of a triangle | A = (b(h))/2 |

Formula for area of a parallelogram | A = b(h) |

Formula for area of a trapezoid | A = ((b1 + b2)h)/2 |

Formula for volume of a prism | V = (base area)height |

Formula for surface area | SA = add up the area of all the faces |

Formula for the volume of a rectangular prism | V= b(h)(d) |

Formula for the volume of a triangular prism | V=(b(h)(.5))(d) |

Formula for the volume of a cylinder | V=Pi(r^2)(height of the cylinder) |

Created by:
mrhunt