Proof: Similar Triangles 2     
line AB line DE
DC = 5
EC = 10
AC = 12
BC = 24
1. 
1. 
AC = 12
5 BC = 120
DC / AC = EC / BC
BC = 24
line AB line DE
ABC ~ DEC
5 / 12 = 10 / BC
DC = 5
EC = 10



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