## 8.3 Outline

- Dimensions
- one-dimensional measurement (length)
- two-dimensional measurement (area)
- three-dimensional measurement (volume)

- Surface area
- Volume
- formula for a cube
- rectangular parallelepiped

- Capacity
- standard units of capacity
- relationship between volume and capacity
- U.S.
- metric

## 8.3 Essential Ideas

The **surface area **of a three-dimensional object is the sum of the areas of the faces.

The **volume **of a three-dimensional object is the number of cubes that can be placed in its interior.

Some common area formula for area are:

cube; *V = s*^{3 }parallelepiped; *V*= lwh

To measure capacity, the amount of liquid held in a container, use the following units of measurement:

U.S. System | Metric System |

gallon (gal.) | liter (L) |

quart (qt; 1/4 gal) | kiloliter (kl; 1,000 L) |

ounce (oz; 1/128 gal) | milliliter (ml; 1/1,000 L) |

cup (c; 8 oz) |