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Sector (instrument)

The sector, also known as a sector rule, proportional compass, or military compass, is a major calculating instrument that was in use from the end of the sixteenth century until the nineteenth century. It is an instrument consisting of two rulers of equal length joined by a hinge. A number of scales are inscribed upon the instrument which facilitate…

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Galileo's sector

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Sector (instrument)

Nodes64
Edges63
Triples0
Avg. degree1.97
Density0.03125
Components1

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lines sector displaystyle scale distance crosswise length set point galileo pivot area number side use arithmetic marked square geometric used

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