Question 1036212
the ratio of the perimeter is equal to 1/10, therefore the ratio of each of the corresponding sides is 1/10.


if the longest side in triangle DEF is 40, then the longest side in triangle ABC is 4, because 40 is 10 * 4.


the ratio of the area of the similar triangles is equal to the ratio of each of the corresponding sides squared.


(1/10)^2 = 1/100.


the ratio of the area of these 2 similar triangles is 1/100.