Question

I need formula
Triangle ABC is similar to triangle DEF and has a ratio of similarity of 5:2. If side AB measures 30 mm, how long is side DE?again just the formula =)

Answer 1

Since the ration of similarity is 5:2, this means that dividing any segment of ABC by the corresponding segment on DEF gives you 5/2


So AB/DE = 5/2

Answer 2

i did 5/2 x 30/? giving me twelve is this ok too

Answer 3

Well since AB/DE = 5/2 and AB = 30, this means


30/x = 5/2


where x is the length of DE

Answer 4

if you solve that equation for x, you'll get x = 12, so you are correct

Answer 5

ok good