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。
angle Angles of less than 90 degrees are called acute angles.
小于90度的角叫锐角。
Angles of less than 90 degrees are called acute angles.
小于90度的角叫锐角。观点
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