How many diagonals can be drawn by joining the vertices of a Dodecagon?
Answer
Correct Answer : d ) 54
Explanation :According the question:
Number of sides (n) in a dodecagon = 12
We know that, number of diagonal=\(n(n-3)\over2\), where n is the number of sides
⇒Number of diagonals=\({12(12-3) \over 2}={12*9 \over 2}=54\)
Hence, (d) is the correct answer.
Such type of question is asked in various government exams like SSC CGL, SSC MTS, SSC CPO, SSC CHSL, RRB JE, RRB NTPC, RRB GROUP D, RRB OFFICER SCALE-I, IBPS PO, IBPS SO, RRB Office Assistant, IBPS Clerk, RBI Assistant, IBPS RRB OFFICER SCALE 2&3, UPSC CDS etc.
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