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From the vertex A of triangle ABC, four straight lines are drawn to meet the base BC at four distinct interior points. How many triangles a…

1809Medium DSSSB TGT Computer Science 0 replies 1 views
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From the vertex A of triangle ABC, four straight lines are drawn to meet the base BC at four distinct interior points. How many triangles are there in the figure?

  • A10
  • B15
  • C12
  • D21
Correct answer: B

Explanation

Including B and C there are 6 points on the base, and each pair of points forms a triangle with A, giving C(6,2) = 15 triangles.

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