Groups: Work in pairs on the Quadperson Interactive Activity. One person should do Problem C1 and one should try Problem C2.
After completing the Interactive Activity, consider which of the new Quadpersons looks more like the original Quadperson, and why. Discuss this in pairs and as a whole group. Explore which line segment drawn in Problem C2 was most dramatically affected by cutting half an inch of the length. In fact, it is the rectangle "nose" that becomes a line segment. Relative to the length of this segment, cutting off half an inch had a dramatic effect.
What would have happened if the original rectangle nose had been a mile long? What effect would cutting off half an inch have had then? Which line segment was most dramatically affected in Problem C1 by taking half its length?
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