関連ワード:  an isosceles triangle has an obtuse angle    an isosceles triangle with an obtuse angle    can an isosceles triangle have an obtuse angle    does an isosceles triangle have an obtuse angle    an isosceles triangle cannot have an obtuse angle    an isosceles triangle cannot have an obtuse angle true or false    can an isosceles triangle have an acute angle    does an isosceles triangle have an acute angle    an isosceles triangle with one obtuse angle    an isosceles triangle has three acute angles  
結果 : an isosceles triangle has an obtuse angle