Origin of Invented Words Equal Sign =

About the history, origins, and definitions of the invented word equal sign =.

ORIGINS OF INVENTED WORDS

Equal (=) sign - The sign of equality in mathematics, two parallel lines, was invented by English mathematician Robert Recorde (1510?

-1558) in his algebra text The Whetstone of Witte (1557). As Recorde explained, "No 2 thynges can be more equalle than 2 parallel straight lines."

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