Let triangle A B C is similar to triangle D E F. In triangle a b c, side a b equals five and side b c equals ten. side d e is unknown, and side e f equals eight. What is the measure of side d e ?

4

8

10

16

Question

Let triangle A B C is similar to triangle D E F. In triangle a b c, side a b equals five and side b c equals ten. side d e is unknown, and side e f equals eight. What is the measure of side d e ?   

4

8

10

16

directrix · Answer

Lengths of corresponding sides of similar triangles are in proportion.
AB/DE = BC/EF
5/DE = 10/8
DE = 4

anonymous · Answer

Thank you but I already found the answer... =)

directrix · Answer

@SavannahSaturn --> I enjoy working on the problems and rarely notice if they are open or closed. Regardless, I hope we got the same answer. :)

anonymous · Answer

Yes we did and I actually got it right. Im kinda the same way. I really enjoy geometry so I have no problem doing it myself sometime. =)