SOLUTION: Polygons ABCD and AFGE are similar. AD = 12 and AE = 6. If AF = 7 what is the length of AB? http://4.bp.blogspot.com/-ZrLpKpV4BZE/Tg0VwfZz1PI/AAAAAAAAAAM/cE0AV9wqtG8/s320/IMG_20

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Question 466267: Polygons ABCD and AFGE are similar. AD = 12 and AE = 6. If AF = 7 what is the length of AB?
http://4.bp.blogspot.com/-ZrLpKpV4BZE/Tg0VwfZz1PI/AAAAAAAAAAM/cE0AV9wqtG8/s320/IMG_20110630_145004.jpg
There is a picture of my problem. Thank you!
-Dimitri

Answer by Love math(28) About Me  (Show Source):
You can put this solution on YOUR website!
AE similar to AD
AF similar to AB
set equation:
(AE /EF)=( AD/AB)
Subtitution
(6/7)=(12/AB)
cross and time
6AB=7*12
AB = 84/6
Ab=14