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

Answer 1

the side ab is congruent to side de
side bc is congruent to side ef
therefore:
ab/bc=de/ef
5/10=x/8
now cross multiply
can you do it now?

Answer 2

ratio of their corresponding sides are in proportion so