Area+&+Volume

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Lesson 10-1

 * Area:** the area of a figure is the number of square units it encloses.
 * Altitude:** an altitude is any segment perpendicular to the line containing the base of a figure, and drawn from the side opposite the base.

Lesson 10-2

 * Altitude of a Triangle:** the perpendicular segment from a vertex of a triangle to the line containing the opposite side; the height is the length of the altitude.

Lesson 10-4
**Space Figure:** a space figure is a three-dimensional figure or solid (for example: a cylinder, cone, or prism)
 * Prism:** a prism is a space figure with two parallel and congruent polygonal faces, called bases, and lateral faces that are parallelograms. A prism is nmaed for the shape of its base.
 * Pyramid:** a pyramid is a space figure with triangular faces that meet at a vertex, and a base that is a polygon. A pyramid is named for the shape of its base.
 * Cylinder:** a cylinder is a space figure with two circular, parallel, and congruent bases.
 * Cone:** a cone is a space figure with one circular base and one vertex.
 * Sphere:** a sphere is the set of points in space that are a given distance from a point, called the center.
 * Net:** a net is a pattern that can be folded to form a space figure.

Lesson 10-5

 * Surface Area:** surface area is the sum of the areas of the base(s) and lateral faces of a space figure.
 * Lateral Area:** the lateral area of a prism is the sum of the areas of the lateral faces.

Lesson 10-6

 * Slant Height:** the height of a face which can be used to find the area of the lateral faces.

Lesson 10-7:

 * Volume:** the volume of a space figure is the number of cubic units needed to fill it.
 * Cubic Unit:** a cubic unit is the amount of space occupied by a cube with sides one unit long.