Using patterns, what is the number of diagonals in an undecagon (11 sides)?
A)40
B)42
C)44
D)46

Name: Using patterns, what is the number of diagonals in an undecagon (11 sides)? A)40 B)42 C)44 D)46
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Question

Quizplus · Accepted Answer

The formula for finding the number of diagonals in a polygon with n sides is n(n-3)/2. 
For an undecagon (11 sides), this formula would be 11(11-3)/2. 
Simplifying this equation, we get 44 diagonals. Therefore, the answer is (C).

Using Patterns, What Is the Number of Diagonals in an Undecagon