acute triangle
noun
plural acute triangles
: a triangle with all acute angles : a triangle with all interior angles (see interior angle sense 1) having less than 90 degrees see triangle illustration compare obtuse triangle, right triangle
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“Acute triangle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acute%20triangle. Accessed 25 Aug. 2026.
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