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Q: If ∆ABC and ∆DEF are congruent, which of the following is Incorrect?
  • A. Perimeter of both the triangles is equal.
  • B. The ratio of AC and DF is 2 :1
  • C. Ratio of Angles in both the triangle is equal.
  • D. AB = DE and BC = EF.
Correct Answer: Option B - ∵In congruent triangles sides are equal so ratio of their sides can't be 2 : 1.
B. ∵In congruent triangles sides are equal so ratio of their sides can't be 2 : 1.

Explanations:

∵In congruent triangles sides are equal so ratio of their sides can't be 2 : 1.