File:Equilateral chord.svg

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Summary

The earliest trigonometry was based on chords of a circle.

A chord of length equal to the radius made a natural base quantity for measuring angles. Using the standard Babylonian sexagesimal divisions, one sixtieth of this defined a degree; while six su

Description	Equilateral chord of a circle
Date	10 October 2007
Source	Own work using Inkscape
Author	Jheald

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Degree (angle)

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