JEE Main · 2023 · 15 Apr 2023 · Shift 1 · Straight Lines

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If is the orthocentre of the triangle ABC with vertices and , then is equal to:
  1. (A)30
  2. (B)25✓ Correct
  3. (C)40
  4. (D)35

Answer: (B)

Solution

The orthocentre is the intersection of two altitudes. The slope of is , so the altitude from has slope , giving . The slope of is , so the altitude from has slope , giving . Solving these, and . Hence .

JEE Main · 2023 · 15 Apr 2023 · Shift 1 · Single correct option

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