関連ワード:  an obtuse triangle has 1 obtuse angle    an obtuse triangle has one obtuse angle true or false    an obtuse triangle has only one obtuse angle    does an obtuse triangle have 1 obtuse angle    an acute triangle has one obtuse angle    an obtuse triangle has at least one obtuse angle    an obtuse triangle has one angle greater than 90 degrees    an obtuse triangle has one angle greater than 180    an obtuse triangle can only have one obtuse angle    a triangle with 1 obtuse angle  
結果 : an obtuse triangle has 1 obtuse angle