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vocab 9

QuestionAnswer
area The measure of the interior surface of a two-dimensional figure.
center The point from which all points on a circle are the same distance.
circle The set of all points in a plane that are the same distance from a given point called the center.
circumference The distance around a circle.
composite figure A figure is made up of two or more figures,
diameter The distance across a circle through its center.
face A flat surface of a polyhedron.
lateral face In a polyhedron, a face that is not a base.
pi The ratio of the circumference of a circle to its diameter. The pi represents this number. The value of pi is 3.1415926.... Approximations for pi are 3.14 and 22/7.
prism A polyhedron with two parallel congruent faces called bases.
pyramid A polyhedron with one base that is a polygon and three or more triangular faces that meet at a common vertex.
radius The distance from the center of a circle to any point on the circle.
regular pyramid A pyramid whose base is a regular polygon and in which the segment from the vertex to the center of the base is the altitude.
semicircle Half of a circle. The formula for the area of a semi circle is A=1/2 pie R squared.
slant height The height of each lateral face.
surface area The sum of the area of all the surfaces of a three-dimensional figure.
volume The number of cubic units needed to fill the space occupied by a solid.
Created by: user-1975173
 

 



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