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TAKE THE QUIZ“Erat”
The following 2 entries include the term Erat.
quod erat demonstrandum
Latin phrase: which (is what) was to be shown (originally) —abbreviation QED —used at the end of a logical or mathematical proof
quod erat faciendum
Latin phrase: which (is what) was to be done (originally) —abbreviation q.e.f. —used at the end of a geometrical construction
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Merriam-Webster unabridged
