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A square has both diagonals, and its top-left and bottom-right corners are each cut off by a line parallel to the other diagonal. How many triangles are there?

Competition practiceCounting Figures
  • A14
  • B8
  • C11
  • D12

Step-by-Step Solution

The diagonals give 4 quarters and 4 halves, 8. Each cut-off corner is a triangle that the diagonal splits into 2 more: . Total .
Answer: A) 14

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