Non-logarithmic Slide Rule

This Demonstration illustrates multiplication by two non-logarithmic slide rules.
In the first case, define . Then . This slide rule has the four scales , , , and .
In the second case, define . Then . This slide rule has the four scales: , , , and , but and can be considered the same.
When , read on the bottom scale below on the scale.

SNAPSHOTS

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DETAILS

Reference
[1] J. Bryant and C. Sangwin, How Round Is Your Circle?, Princeton, NJ: Princeton University Press, 2008 pp. 247–248.
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