SOLUTION: The Academy plans to lay out buildings equally spaced around a circle and wants sidewalks connecting every building to each other. Write an expression for the number of sidewalks

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Question 1095545: The Academy plans to lay out buildings equally spaced around a circle and wants sidewalks connecting every building to each other. Write an expression for the number of sidewalks needed for n buildings.
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.
%28n%2A%28n-1%29%29%2F2   sidewalks.