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A triangle has two lines drawn from its top corner down to the base. How many triangles are there in the figure?

Competition practiceCounting Figures
  • A3
  • B4
  • C6
  • D5

Step-by-Step Solution

The top corner sends out 4 lines (the 2 sides and the 2 inner lines). Any 2 of them, closed off by the base, make a triangle: .
Answer: C) 6

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