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Ex 7.1, 4 - l and m are two parallel lines intersected - ASA/AAS

  1. Chapter 7 Class 9 Triangles
  2. Serial order wise
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Ex7.1, 4 l and m are two parallel lines intersected by another pair of parallel lines p and q (see the given figure). Show that ΔABC ≅ ΔCDA. Given: l ∥ m & p ∥ q To prove: ΔABC ≅ ΔCDA Proof: Taking l ∥ m and AC is the transversal, ∠ACB = ∠ CAD Considering p ∥ q and AC is the transversal, ∠BAC = ∠DCA In ΔABC and ΔCDA, ∠ACB = ∠CAD AC = CA ∠BCA = ∠DAC ∴ ΔABC ≅ ΔCDA Hence proved

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