Ex 9.3, 7 - D and E are points on sides AB and AC of ABC - Ex 9.3

  1. Chapter 9 Class 9 Areas of parallelograms and Triangles
  2. Serial order wise
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Ex 9.3, 7 D and E are points on sides AB and AC respectively of ΔABC such that ar (DBC) = ar (EBC). Prove that DE ∥ BC. Given: ∆ ABC where D and E are points on sides AB and AC such that ar (DBC) = ar (EBC) To prove: DE ∥ BC Proof : ΔDBC and ΔEBC are lying on a common base BC and have equal areas, & they lie between the lines DE and BC. So, DE ∥ BC Hence proved

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