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Find the area, in square units, of the triangle whose vertices are the points (1, 2), (−3, 4) and (5, −6).

Competition practiceAreas & Volumes
  • A24
  • B6
  • C12
  • D18

Step-by-Step Solution

Area = ½|₁₂ − ₃) + ₂₃ − ₁) + ₃₁ − ₂)| = ½|| = ½|10 + 24 − 10| = ½ × 24 = 12 square units.
Answer: C) 12

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