anonymous
  • anonymous
Alright, freshman accelerated honors geometry problem. I need ton of help. How do you find the distance between a point and a line? Ex: Line L contains points (11,-1) and (-3,-11). Point P has coordinates (-1,1). HELP.
Mathematics
schrodinger
  • schrodinger
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Lukecrayonz
  • Lukecrayonz
Ever consider you shouldn't be in accelerated honors geometry?
anonymous
  • anonymous
No? This is actually the only topic we've covered that I don't understand. I feel like that was an insult...
anonymous
  • anonymous
Slope of line L gives you slope of perpendicular.....

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anonymous
  • anonymous
okay so you need to use the distance formula to find the distance between two points :) \[d=\sqrt {(y_2-y_1)+(x_2-x_1)}\]
cgreenwade2000
  • cgreenwade2000
estudier? What?
Lukecrayonz
  • Lukecrayonz
Find midpoint between the two points on the given line, use distance formula to find the distance between the given point and the midpoint.
anonymous
  • anonymous
so using that you would get \[L=\sqrt{(-11+1)+(-3-11)}\]
anonymous
  • anonymous
All I know is that I need to find the point the coordinate is closest to on the line, then use the slope to find the length of the line its used to.
Lukecrayonz
  • Lukecrayonz
No, Yummy, this is the correct way.
anonymous
  • anonymous
yummydum, thats the distance from an endpoint to the point, not the line.
anonymous
  • anonymous
okay well go with what sire crayon has to saay
Lukecrayonz
  • Lukecrayonz
You're finding a farther distance than needed
anonymous
  • anonymous
i was getting to that
anonymous
  • anonymous
yeah
anonymous
  • anonymous
http://math.ucsd.edu/~wgarner/math4c/derivations/distance/distptline.htm
Lukecrayonz
  • Lukecrayonz
http://screensnapr.com/v/14wXYK.jpg
Lukecrayonz
  • Lukecrayonz
Explanation, answer is 8.6.
Lukecrayonz
  • Lukecrayonz
@yummydum your distance was 12.17, much farther than the actual distance.
anonymous
  • anonymous
estudier that is not how i remember us learning it in school, we learned a shorter way
anonymous
  • anonymous
It is short, they are just explaining everything in great detail.
anonymous
  • anonymous
again...that wasnt my final answer i was getting to the point...but i see uve got this covered
Lukecrayonz
  • Lukecrayonz
estudier that makes it look very confusing :P
anonymous
  • anonymous
Ok i think i understand it now. Thanks Luke

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