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Session 4, Part C:
Quadperson
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This activity compares the effects of absolute and relative comparisons on a picture. Think about what would happen to a drawing if every line were made half as long. Would it look like the same picture at all? What would happen if you made every line a half-inch shorter? In this activity, you will see the effects of these changes on Quadperson, a drawing of a face made of quadrilaterals.
(one grid = 1/2 inch)
On a piece of graph paper, draw a picture of Quadperson so that each line in your drawing is half as long as the corresponding line in the picture above. Then, make another picture of Quadperson so that each line in your drawing is a half-inch less in length as the corresponding line in the original Quadperson.
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Problem C1 |  |
Compare the "before" and "after" quadperson when you multiplied each length by one-half.
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Problem C2 | |
Compare the "before" and "after" quadperson when you subtracted half an inch from each length.
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Problem C3 | |
Of Problems C1 and C2, which is a relative comparison? Which is an absolute comparison? Explain how you know. |
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Problem C4 | |
Did the Quadperson look the same after a change made by an absolute comparison? Did the Quadperson look the same after a change made by a relative comparison? Why? |
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