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hypotenuse
The longest side of a right triangle – the one opposite the right angle. The word comes from the Greek roots hypo meaning "under" (which also appears, for example, in "hypodermic" – "under the skin") and tein or ten, for stretch. Thus hypotenuse is the line segment "stretched under" the right angle. See also Pythagoras' theorem.
Related category
• GEOMETRY
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