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Highly selective Backlog Qs for JEE MainMathematicsStraight Lines

If C is the reflecton of A (2,4) in x -axis and B is the reflection of C in y -axis, then | AB | is

Options

  1. A20
  2. B2 5
  3. C4 5
  4. D4

Correct answer

C. 4 5

Step-by-step solution

aligned & Hints: A (2,4) ; C (2,-4) ; B (-2,-4) & |A B|= (2-(-2))^2+(4-(-4))^2 = 4^2+8^2 & = 16+64 = 80 = 16 5 =4 5 aligned

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