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Learning Math Home
Geometry Session 3: Polygons
Session 3 Part A Part B Part C Homework
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Session 3 Materials:

Session 3, Part B:
Classifying Polygons

In This Part: Properties of Polygons | Grouping Polygons | Polygon-Classification Game
More Venn Diagrams

You will now play a polygon classification game using Venn diagrams.

Venn diagrams use circles to represent relationships among sets of objects. They are named after John Venn (1834-1923) of England. Venn, a priest and historian, published two books on logic in the 1880s. Venn diagrams can be used to solve certain types of logic puzzles.


Problem B2


As a warm-up for the game, put each of the labels Regular, Concave, and Triangle next to one of the circles on the diagram. Place all the polygons in the correct regions of the diagram.

Stop!  Do the above problem before you proceed.  Use the tip text to help you solve the problem if you get stuck.
As you're placing polygons in the labeled circles, think which properties each polygon has and then check whether that property is shared with any other of the labels. It might also be helpful to create a grid listing all the polygons and labels and filling it in for easier viewing of the shared properties among polygons.   Close Tip


Problem B3


See if you can determine the correct labels for each of the Venn diagrams in the following interactive activity:


This activity requires the Flash plug-in, which you can download for free from Macromedia's Web site. If you prefer, you can view the non-interactive version of this activity, which doesn't require the Flash plug-in.

Next > Part B (Continued): More Venn Diagrams

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