Question 158298
the ratio of the areas of similar figures is the square of the ratio of their side lengths


look at a square of side length s, the area is s^2
__ if you double the side length, the area is 2s*2s or 4s^2
__ doubling the side length, quadruples the area (square relation)


if the area of a tiling triangle is 1/25, then the side length must be 1/5
__ 1/5 squared is 1/25


so the side lengths are 30cm, 35cm, and 40cm