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pons asinorum

[as-uh-nawr-uh m, -nohr-] /ˌæs əˈnɔr əm, -ˈnoʊr-/
a geometric proposition that if a triangle has two of its sides equal, the angles opposite these sides are also equal: so named from the difficulty experienced by beginners in mastering it. Euclid, 1:5.
Origin of pons asinorum
First recorded in 1745-55, pons asinorum is from the Latin word pōns asinōrum bridge of asses Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for pons asinorum
Historical Examples
  • The bridge of stability is therefore not even a pons asinorum.

  • The goal of Socialism, so far as it relates to this pons asinorum of shortening hours, is simply the right to loaf.

    The New Society Walther Rathenau
  • Who knows but what I may die a glorious death under the pons asinorum after all?

  • This proposition has long been called the pons asinorum, or bridge of asses, but no one knows where or when the name arose.

    The Teaching of Geometry David Eugene Smith
  • The paradox of predication, that it seems to deny identity, or to deny difference, becomes a pons asinorum.

  • Ay, there is the pons asinorum, the bridge whereon young asses and old fools come to such terrible grief.

    Mr. Isaacs F. Marion Crawford
  • We will sit with our arms round each other's waists on the pons asinorum, and see the stream of mathematics flow beneath.

    Roundabout Papers William Makepeace Thackeray
  • Thats as easy as pons asinorum to say, but not so easy to do, commented number six—Billie Burden.

    The Eight-Oared Victors

    Lester Chadwick
  • Your lordship's acute intellect has comprehended my pons asinorum with great intelligence.

  • The story is told that one of his pupils, arrived perhaps at the pons asinorum, asked, "What do I get by learning these things?"

British Dictionary definitions for pons asinorum

pons asinorum

the geometric proposition that the angles opposite the two equal sides of an isosceles triangle are equal
Word Origin
Latin: bridge of asses, referring originally to the fifth proposition of the first book of Euclid, which was considered difficult for students to learn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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