kieante01 kieante01
  • 18-05-2017
  • Mathematics
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Аноним Аноним
  • 18-05-2017
15 cm because they are similar, and EF is the same line as BC
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Аноним Аноним
  • 18-05-2017
Set up a ratio between corresponding sides

9/12 = 15/x - the cross product will be equal since the fractions are equal

9x = 180
x = 180/9 = 20
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