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



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