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Old 07-30-2007   #1
erekjefferson
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Default Geometry Please Help?

Floor plans for a building have the four corners of a room located at the points (2, 3), (11, 6), (-3, 18), and (8, 21). Determine whether the side through the points (2, 3) and (11, 6) is perpendicular to the side through the points(2, 3) and (-3, 18).
 
Old 07-30-2007   #2
larrymels
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-3,-2,-1,0,1,2,3,4,5,6,7,8.9.10.1134567891011121314151617 18graph it, line up the 1st number(horizontal) with the vertical number. if the final two lines arent at a 90 degree angle (L)L is perpendicular
 
 

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