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How many points with whole-number coordinates lie strictly inside the rectangle with corners (0, 0), (4, 0), (4, 3) and (0, 3)?

Class 9Figures on the Coordinate PlaneCoordinate Geometry
  • A9
  • B20
  • C6
  • D12

Step-by-Step Solution

Strictly inside means 0 < < 4 and 0 < can be 1, 2, 3 and can be 1, 2. That gives points. (12 is the area; 20 counts every lattice point including the boundary.)
Answer: C) 6

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