SOLUTION: ∆ABC is similar to ∆DEF. The ratio of the perimeter of ∆ABC to the perimeter of ∆DEF is 1 : 10. The longest side of ∆DEF measures 40 units. The

Algebra ->  Triangles -> SOLUTION: ∆ABC is similar to ∆DEF. The ratio of the perimeter of ∆ABC to the perimeter of ∆DEF is 1 : 10. The longest side of ∆DEF measures 40 units. The      Log On


   



Question 1036212: ∆ABC is similar to ∆DEF. The ratio of the perimeter of ∆ABC to the perimeter of ∆DEF is 1 : 10. The longest side of ∆DEF measures 40 units.


The length of the longest side of ∆ABC is 2 4 16 30 units. The ratio of the area of ∆ABC to the area of ∆DEF is 1 : 1 1 : 2 1 : 10 1 : 100 .

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
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.