A polygon has 54 diagonals. The number of sides in the polygon is :

1.	A polygon has 54 diagonals. The number of sides in the polygon is :
A.	7
B.	9
C.	12
D.	11
E.	None of these
Answer» D. 11

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A polygon has 54 diagonals. The number of sides in the polygon is :

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