An **obtuse triangle** has 1 obtuse angle. The rest of them are acute. The equation a^{2} + b^{2} < c^{2} can be used to prove that triangles are obtuse by using their sides.

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An **obtuse triangle** has 1 obtuse angle. The rest of them are acute. The equation a^{2} + b^{2} < c^{2} can be used to prove that triangles are obtuse by using their sides.

This article is a stub. You can help Math Wiki by expanding it. |

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