<p>Numero 8 pg 776</p>
<p>Rectangle ABCD lies in the xy plane so that its sides are not parallel to the axes. What is the product of the slopes of all four sides of the rectangle ABCD</p>
<p>-2
-1
0
1
2</p>
<p>the slopes of lines of a rectangle are always perpindicular which means negative reciprocal slopes, which means its going to be x<em>-1/x</em>x*-1/x that equals 1</p>
<p>of course i am pretty tired since its midnight so i could be wrong</p>
<p>Ditto to what Nalcon said. By definition, a rectangle has perpendicular sides, so if the slope of one side is x, then the perpendicular side has a slope of -1/x. That means the product = (x) * (x) * (-1/x) * (-1/x) = (x^2)/(x^2) = 1</p>