obtuse triangle
noun
plural obtuse triangles
: a triangle with an obtuse angle : a triangle with one interior angle (see interior angle sense 1) exceeding 90 degrees see triangle illustration compare acute triangle, right triangle
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“Obtuse triangle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/obtuse%20triangle. Accessed 27 Aug. 2026.
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