Chapter 2 Challenge

One aspect of geometric thinking is the ability to look at a group of shapes and find some common features that define the group. For example, you know that rectangles are part of the set of figures called quadrilaterals.

 

At some point, you may be asked to classify objects based on examples and non-examples. Look at the two sets of objects below. (“Wamps” is a made-up name.)

Which of the following objects are wamps?

A.   

B. 

C. 

Notice that the wamps are all closed figures. The non-wamps are either open figures or two closed figures joined at a single point. So figures A and C above are wamps.

Look at the two sets of objects below. (“Flupes” is a made-up name.)

 

A. 

B. 

C. 

1.  Create a group of figures with certain characteristics and give them a made-up name. Then create a set of figures that are non-examples for your group. Finally, write a definition for the figures in your group.