Which Shape Doesn't Belong Worksheets
How Do You Determine Shapes That Do Not Belong to a Group  When we were little, we had a very simple definition of the various terms. We thought that if someone is tall to look at, the person was tall if someone looked fat, we assumed that they would be heavy, if we saw a bird, we thought that it is light. Similarly, we thought that the elephant is big, and the ant is small. All of this is totally true! But as we grew older, we realized that these definitions could not be applied in every platform. Just like that, in math, when we are studying shapes, we are given various shapes, and it gets difficult to identify which shape is similar and which is not. But the idea is pretty simple, really! All you have to do is look at the shapes very carefully. Start by making groups of the shapes that look similar. Once you place the shapes that are similar in a group, it becomes relatively easy to guess which doesn’t belong in the group. For example, in a group of triangles, a circle doesn’t belong. In a group of squares, a rectangle does not belong!

Basic Lesson
Provides the logic for the unit basing the concept on the number of sides. 2 practice problems are included.
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Independent Practice 1
Students are presented with 20 sets of shapes. The answers can be found below. Circle the shape that does not belong.
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Independent Practice 2
We add unique shapes to give the problems new meaning. The answers can be found below.
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Homework Worksheet
Students work on twelve problems. An example is provided as review.
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Skill Quiz
Ten problems to provide assessment for the unit. A scoring matrix is provided.
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What's the Point?
There is no logical foundation of mathematics, and Godel has proven it!