anonymous
  • anonymous
Graph the points for Line AB and Line CD A(8, 4), B(4, 3), C(4, -9), D(2, -1) Is the measure perpendicular, parallel, or neither? My answer is perpendicular according to the slope formula but when you graph it, it's different. There's no intersection. Help please?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
http://upload.wikimedia.org/math/9/d/9/9d9e1aa5fab25d8dd659c0fb6e83234b.png That's the slope formula
anonymous
  • anonymous
make intersecting lines on a graph
anonymous
  • anonymous
you mean i should draw it?

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anonymous
  • anonymous
yes you have to draw it and then mark the spots. that is the only way we can tell what the lines look like.
anonymous
  • anonymous
|dw:1349305969471:dw| This is how the graph looks like, but perpendicular lines have intersection points, this one doesn't. And according to how I solved it (twice) with the slope formula, it's a perpendicular line. But in the graph it shows like this.
Geometry_Hater
  • Geometry_Hater
If the lines look like that then they would intersect perpendicularly. So i think you are right.
anonymous
  • anonymous
Wait, so you're saying they WILL intersect?
anonymous
  • anonymous
Geometry_Hater
  • Geometry_Hater
They're lines right? So they would go on forever.....Eventually intersecting at some point unless of course they are parallel.
anonymous
  • anonymous
OH LOL I NEVER THOUGHT OF THAT '-' Thanks! XD

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