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right triangle

   Also found in: Dictionary/thesaurus, Medical, Financial, Acronyms, Wikipedia, Hutchinson 0.07 sec.
right triangle [′rīt ′trī‚aŋ·gəl]
(mathematics)
A triangle one of whose angles is a right angle.


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Diaconis speculates that Archimedes might have been using the Stomachion to construct a pictorial proof of some geometric result such as the Pythagorean theorem, the famous equation relating the lengths of the two shorter sides of a right triangle and the length of the hypotenuse.
The triangles you have made in steps 2 through 4 are isosceles right triangles.
 
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