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| Earth Science | 1 |
| Geometry | 1 |
| Mathematics Education | 1 |
| Measurement | 1 |
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| Scientific American | 1 |
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| Walker, Jearl | 1 |
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| Journal Articles | 1 |
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Walker, Jearl – Scientific American, 1979
Detailed descriptions are given of two procedures for measuring the radius of the earth, one using a rule and the other a stopwatch. (MP)
Descriptors: Earth Science, Geometry, Mathematics Education, Measurement
