document.write( "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. \n" ); document.write( "
Algebra.Com's Answer #710058 by ikleyn(52782)\"\" \"About 
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\n" ); document.write( "\"%28n%2A%28n-1%29%29%2F2\"   sidewalks.\r
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