関連ワード:  a triangle with 1 obtuse angle    a triangle with 1 obtuse angle is called    a triangle with one obtuse angle and no congruent sides    a triangle with one obtuse angle and two congruent sides    a triangle with at least 1 obtuse angle    draw a triangle with one obtuse angle    a scalene triangle with one obtuse angle    a triangle with exactly one obtuse angle    draw a triangle with one obtuse angle and no congruent sides    an isosceles triangle with one obtuse angle