I'm assuming the triangle is equilateral because otherwise this problem would be nearly impossible. A triangle has 3 sides, and you need to divide the 100 cm equally between the equal sides. 100/3 is 33 1/3, therefore if this triangle was equilateral, each side would be 33 1/3 cm.
I'm assuming the triangle is equilateral because otherwise this problem would be nearly impossible. A triangle has 3 sides, and you need to divide the 100 cm equally between the equal sides. 100/3 is 33 1/3, therefore if this triangle was equilateral, each side would be 33 1/3 cm.