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Two lines run from the top corner of a triangle down to its base. Counting only the corners and the points on the base as marked points, how many line segments are there?

Competition practiceCounting Figures
  • A6
  • B8
  • C9
  • D10

Step-by-Step Solution

The base holds 4 marked points: . Each of the 4 lines from the top corner holds 2 marked points: 4. Total .
Answer: D) 10

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