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In triangle ABC, DE is parallel to BC with D on AB and E on AC. If AD = 3 cm, DB = 6 cm and AE = 4 cm, find EC. (answer in cm)

Competition practiceGeometry
  • A8
  • B6
  • C12
  • D2

Step-by-Step Solution

By the Basic Proportionality Theorem, AD/DB = AE/EC. So 3/6 = 4/EC, giving EC = 8.
Answer: A) 8

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