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  2. The Purloined Letter - Wikipedia

    en.wikipedia.org/wiki/The_Purloined_Letter

    December 1844. " The Purloined Letter " is a short story by American author Edgar Allan Poe. It is the third of his three detective stories featuring the fictional C. Auguste Dupin, the other two being "The Murders in the Rue Morgue" and "The Mystery of Marie Rogêt". These stories are considered to be important early forerunners of the modern ...

  3. The Triangular Book of St. Germain - Wikipedia

    en.wikipedia.org/wiki/The_Triangular_Book_of_St...

    The Triangular Book of St. Germain or The Triangular Manuscript is an untitled 18th-century French text written in code, and attributed to the famous Count of St. Germain. It takes its name from its physical shape: the binding and sheets of vellum that comprise the manuscript are in the shape of an equilateral triangle.

  4. The Secrets of Triangles - Wikipedia

    en.wikipedia.org/wiki/The_Secrets_of_Triangles

    Alfred S. Pasamentier, Ingmar Lehmann. Genre. Mathematics. Publisher. Prometheus Books. Publication date. 2012. The Secrets of Triangles: A Mathematical Journey is a popular mathematics book on the geometry of triangles. It was written by Alfred S. Posamentier and Ingmar Lehmann [ de], and published in 2012 by Prometheus Books .

  5. Hiding in Plain Sight (Kendzior book) - Wikipedia

    en.wikipedia.org/wiki/Hiding_in_Plain_Sight...

    [2] [3] On 23 April 2020, Hiding in Plain Sight was listed as a bestseller in the "New Release" category by the Vancouver Sun. [4] Reviews have appeared in Library Journal, [5] Medium [6] Kirkus Reviews, [7] Publishers Weekly, [8] and The Arts Fuse. [9] Library Journal characterized Hidden in Plain Sight as "A chilling account of how the media ...

  6. Triangulation - Wikipedia

    en.wikipedia.org/wiki/Triangulation

    Measuring the height of a building with an inclinometer. Triangulation today is used for many purposes, including surveying, navigation, metrology, astrometry, binocular vision, model rocketry and, in the military, the gun direction, the trajectory and distribution of fire power of weapons. The use of triangles to estimate distances dates to ...

  7. In Plain Sight (Jackson book) - Wikipedia

    en.wikipedia.org/wiki/In_Plain_Sight_(Jackson_book)

    9781626722552. OCLC. 928488455. In Plain Sight is a 2016 book by Richard Jackson and illustrator Jerry Pinkney. It is about a girl, Sophie, who, every day after school, helps her grandfather to find a small item that he has supposedly lost.

  8. Euclid's Elements - Wikipedia

    en.wikipedia.org/wiki/Euclid's_Elements

    The Elements (Greek: ΣτοιχεῖαStoikheîa) is a mathematical treatise consisting of 13 books attributed to the ancient Greek mathematician Euclid c. 300 BC. It is a collection of definitions, postulates, propositions (theorems and constructions), and mathematical proofs of the propositions. The books cover plane and solid Euclidean ...

  9. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.