関連ワード:
an equilateral triangle has three congruent sides an equilateral triangle has three equal sides an equilateral triangle has 3 congruent sides an isosceles triangle has three congruent sides true or false an equilateral triangle has three equal sides true or false an isosceles triangle has three congruent sides an isosceles triangle has three equal sides an equilateral triangle has 3 equal sides an isosceles triangle has three equal sides true or false an equilateral triangle has three equal angles
