'It was 16th C. mathematician Robert Recorde who first used 2 parallel lines as this'
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SIGNS & SYMBOLS: It was 16th C. mathematician Robert Recorde who first used 2 parallel lines as this
It was 16th C. mathematician Robert Recorde who first used 2 parallel lines as this
It was 16th C. mathematician Robert Recorde who first used 2 parallel lines as this
SIGNS & SYMBOLS
equal sign
SIGNS & SYMBOLS