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The Equationn D=12n(n−3)D = \frac { 1 } { 2 } n ( n - 3 )

Question 229

Multiple Choice

The equationn D=12n(n−3) D = \frac { 1 } { 2 } n ( n - 3 ) gives the n gives the umber of diagonals D for a polygon with n sides. Use this equation to solve the problem.
-Find the number of diagonals for a polygon that has 14 sides.


A) 11 diagonals
B) 77 diagonals
C) 119 diagonals
D) 154 diagonals

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