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Concept

Obtuse Triangle

An obtuse triangle is a triangle that has one obtuse angle. In other words, one of the angles measures more than

9 0^{\circ} .

obtuse triangle vs. Not an obtuse triangle

In case the angles are measured in radians, a triangle is obtuse when one of the angles measures more than

\frac{π}{2},

or about

1.57

radians.

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