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ollegr [7]
4 years ago
9

URGENT!

Mathematics
2 answers:
kaheart [24]4 years ago
5 0

The answer is A. X=7

valina [46]4 years ago
3 0

Answer:

x = 7

Step-by-step explanation:

Since triangle ABC is similar to Triangle DEF,

BC = 21 cm

EF = 9 cm

so, the proportion is 9:21

9 : 21

1 : 21/9

3 : 21/9 (3)

3 : 21/3

3 : 7

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