関連ワード:  triangle with equal angles is called    triangle with two equal angles is called    triangle with all angles equal is called    a triangle with no equal angles is called    a triangle with three equal angles is called    a triangle with 3 equal angles is called    a triangle with equal base angle is called    a triangle with equal sides and angles is called    triangle with two sides or two angles equal is called    a triangle with all sides and angles equal is called