Numbers

3-83 Naming Polygons

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Some figures are closed and some figures are open.
A polygon is a closed figure made up of 3 or more line segments.
Look at the figures below.

 

Traingle4.gif (1200 bytes) Square20.gif (1088 bytes) Poly7.gif (1725 bytes)
Spacer.gif (42 bytes)
These figures are closed.

These figures are polygons.

 

OpenCircle.gif (1155 bytes) OpenRect.gif (1200 bytes) OpenPoly.gif (1305 bytes)
Spacer.gif (42 bytes)
These figures are open.

These figures are not polygons.

 

Polygons are formed by line segments. A circle does not have line segments.  A circle is not a polygon.  Triangles, squares, and rectangles are polygons, as well as other closed figures that are made up of 3 or more line segments.

 

Look at the figures below.  Write "Yes" if the figure is a polygon and write "No" if the figure is not a polygon.

 

Square20.gif (1088 bytes) Traingle4.gif (1200 bytes)
Polygon? Polygon?
Spacer.gif (42 bytes)
OpenRect.gif (1200 bytes) OpenCircle.gif (1155 bytes)
Polygon? Polygon?
Spacer.gif (42 bytes)
Rectangle10.gif (1112 bytes) Poly3.gif (1230 bytes)
Polygon? Polygon?
Spacer.gif (42 bytes)
OpenPoly5.gif (1350 bytes) Poly4.gif (1532 bytes)
Polygon? Polygon?
Spacer.gif (42 bytes)
Circle1.gif (1376 bytes) OpenPoly6.gif (1252 bytes)
Polygon? Polygon?

 
 

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