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face

the flat surface of a three-dimensional figure

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edge

the line segment where two faces of a three-dimensional figure meet

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length

the measure of a line segment, or one side or edge of a figure

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volume

the measure of the amount of space occupied by an object

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cubic unit

a unit for measuring volume such as a cubic inch or cubic centimeter. It is the volume of a cube with 1-unit edges

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rectangular prism

a prism with congruent rectangular bases

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area

the amount of surface covered or enclosed by a figure measured in square units

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one-dimensional

having only length as a measure. A line segment is this.

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two-dimensional

having length measurements in two directions, perpendicular to each other (length, width)

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three-dimensional

having length measurements in three directions, perpendicular to one another (length, width, height)

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capacity

a measure of how much a container can hold, also used to describe the volume of fluids such as water or sand

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liter

the basic unit of capacity in the metric system

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milliliter

a metric unit of capacity equal to 0.001 liter

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kiloliter

a unit of capacity equal to 1,000 liters

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mass

the amount of matter in an object. It is constant; weight varies because it is subject to the effect of gravity on matter.

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kilogram

a unit of mass equal to 1,000 grams

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gram

the basic unit of mass in the metric system. A nickel weighs about 5 of these.

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milligram

a metric unit of mass equal to 0.001 gram.

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ounce

a unit of weight or capacity in the U.S. customary system equal to 1/16 of a pound or 1/8 of a cup

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pound

a U.S. customary unit for measuring mass. One is equal to sixteen ounces.

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ton

a customary unit for measuring mass. One is equal to 2,000 pounds.

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gallon

a U.S. customary unit for measuring capacity. One of these is equal to 4 quarts.

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quart

a U.S. customary unit for measuring capacity. One is equal to 32 ounces, 4 cups, 2 pints.

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pint

a U.S. customary unit for measuring capacity. One is equal to two cups or half a quart.

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cup

a customary unit for measuring capacity. There are 2 of these in a pint.

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