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Obtuse triangle: One of the three angles is an obtuse Angle. The other two are acute angles.
钝角三角形：有一个角是钝角，有两个角是锐角。
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A triangle that contains an obtuse interior Angle.
有一个内角是钝角的三角形。
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A triangle that contains an obtuse interior Angle.
有一个内角是钝角的三角形。
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