関連ワード:
equilateral triangle has three congruent angles equilateral triangle has three congruent sides does equilateral triangle has three congruent angles equilateral triangle with three congruent sides a regular triangle has three congruent angles all equilateral triangles have three congruent angles all equilateral triangles have three congruent angles true or false does equilateral triangle has three congruent sides an isosceles triangle has three congruent sides true or false an isosceles triangle has three congruent sides
