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Which of the shapes cannot be traced without lifting up your pencil and without tracing over the same edge twice?

 

 Jun 30, 2020
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First off, just by glancing at the shapes, we can tell that C is different.

A, B, and D's lines are all straight, while C has four curved lines.

So we can reasonably guess that C is the correct choice.

However, you can also test it out. It becomes obvious after a few trials that no matter what you do, it's impossible not to retrace the same edge. 

 Jun 30, 2020

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