Problem: The number of diagonals that can be drawn in a polygon of 100 sides is:
Answer Choices:
A. 485048504850
B. 495049504950
C. 990099009900
D. 989898
E. 880088008800 Solution:
d=n(n−3)/2=100⋅97/2=4850d=n(n-3) / 2=100 \cdot 97 / 2=4850d=n(n−3)/2=100⋅97/2=4850.