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Triangle (disambiguation)
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==Mathematics== * [[Exact triangle]], a collection of objects in category theory * [[Triangle inequality]], Euclid's proposition that the sum of any two sides of a triangle is longer than the third side * American expression for [[set square]], an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline * The [[triangle graph]] in [[graph theory]]
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