Respuesta :

Answer:

ED = 20

Step-by-step explanation:

Because the triangles are similar,

EF/BC = ED/BA

EF = 12, BC = 6, BA = 10, ED = x

plug in the values

12/6 = x/10

2 = x/10

Multiply 10 to both sides

2*10 = x*10/10

20 = x

x = 20

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