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# unit 5: area and vol

### unit 5; area and volume

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

2-Dimensional | A shape that only has two dimensions (such as width and height) and no thickness. |

3-Dimensional | An object that has height, width and depth (thickness), like any object in the real world. |

Area | The number of square units it takes to completely fill a space or surface. |

Bases of a Prism | The two faces formed by congruent polygons that lie in parallel planes, all of the other faces being parallelograms. |

Cubic Units | Volume of the solids is measured in Cubic Units. |

Edge | The intersection of a pair of faces in a three-dimensional figure. |

Equilateral Triangle | A triangle which has all three of its sides equal in length. |

Face | One of the polygons that makes up a polyhedron. |

Fractional edge length | The length of each edge of the cube is a fraction. |

Isosceles Triangle | A triangle which has two of its sides equal in length. |

Kite | A quadrilateral with two distinct pairs of equal adjacent sides. |

Lateral Faces | In a prism, a face that is not a base of the figure. |

Net | A two-dimensional figure that, when folded, forms the surfaces of a three-dimensional object. |

Parallelogram | A quadrilateral with both pairs of opposite sides parallel. |

Polygon | A number of coplanar line segments, each connected end to end to form a closed shape. |

Regular polygon | all sides equal and all interior angles equal in the polygon. |

Irregular polygon | A polygon in which the sides are not all the same length nor does the interior angles have the same measure. |

Polyhedron | A 3-dimensional figure that has polygons as faces. |

Prism | A polyhedron with two parallel and congruent faces, called bases, and all other faces that are parallelograms. |

Quadrilaterals | Four coplanar line segments linked end to end to create a closed figure. A four sided polygon. |

Rectangle | A 4-sided polygon where all interior angles are 90°. |

Rectangular prism | A solid (3-dimensional) object which has six faces that are rectangles. |

Rhombus | A quadrilateral with all four sides equal in length. |

Right Triangle | A triangle where one of its interior angles is a right angle (90 degrees). |

Right rectangular prism | In a right prism, the lateral faces are each perpendicular to the bases. |

Scalene Triangle | A triangle where all three sides are different in length. |

Square | A quadrilateral that has four right angles and four equal sides. |

Surface area | The total area of the 2-dimensional surfaces that make up a 3-dimensional object. |

Trapezoid | A quadrilateral which has one pair of parallel sides. |

Triangles | A closed figure consisting of three line segments linked end-to-end. A 3-sided polygon. |

Triangular prism | A prism whose bases are triangles. A solid (3-dimensional object what has five faces |

Vertices | The common endpoint of two or more rays or line segments |

Volume | The amount of space occupied by an object. |

Volume of a Prism | The area of a base times the height. The number of cubic units to fill a prism. |

Created by:
mcrippen