Concept explainers
Here we celebrate the power of algebra as a powerful way of finding unknown quantities by naming them, of expressing infinitely many relationships and connections clearly and succinctly, and of uncovering pattern and structure.
On the edge. Suppose you make a Möbius band with a strip of paper x inches long. (Assume there is no overlap of the taped edges.) How long is the edge of your Möbius band? Suppose you cut your band in half down the middle as described in Experiment 3 in this section. How long is the edge now?
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The Heart of Mathematics: An Invitation to Effective Thinking
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