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Vocab. 1.5 Gr.4 Everyday Math
Polygons
10
Mathematics
Not Applicable
08/04/2005

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Term
pentagon
Definition
A 5-sided polygon.
Term
side
Definition
Any of the line segments that make up a polygon. Sometimes a face of a 3-dimensional figure is called a side.
Term
convex
Definition
A polygon in which all vertices are "pushed outward."
Term
nonconvex or concave
Definition
A polygon in which at least one vertrx is "pushed inward."
Term
hexagon
Definition
A 6-sided polygon.
Term
heptagon
Definition
A 7-sided polygon.
Term
octagon
Definition
An 8-sided polygon.
Term
nonagon
Definition
A 9-sided polygon.
Term
n-gon
Definition
A polygon with "n" sides. For example, a 5-gon is a pentagon and an 8-gon is an octagon. Polygons with large numbers of sides are usually named only as n-gons such as 13-gon and 100-gon and so on.
Term
interior
Definition
A set of all points in a plane "inside" a closed 2-dimensional figure, such as a polygon or circle.
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