関連ワード:  an isosceles triangle cannot have an obtuse angle    an isosceles triangle cannot have an obtuse angle true or false    an isosceles triangle can have a right angle    an isosceles triangle can have an obtuse interior angle    can an isosceles triangle have an obtuse angle    can an isosceles triangle have an acute angle    an isosceles triangle can be an obtuse angle    can an isosceles triangle have two obtuse angles    an isosceles triangle can be an obtuse angle triangle true or false    an isosceles triangle can be an obtuse angle triangle also  
結果 : an isosceles triangle cannot have an obtuse angle