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Question: Answered & Verified by Expert
The number of rectangles that can be obtained by joining four of the twelve vertices of a 12 -sided regular polygon is-
MathematicsPermutation CombinationKVPYKVPY 2010 (SB/SX)
Options:
  • A 66
  • B 30
  • C 24
  • D 15
Solution:
2218 Upvotes Verified Answer
The correct answer is: 15
Number of diagonals passing through centre $=6$.
number of rectangles $={ }^{6} C_{2}=15$

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