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321drew123

  • 3 years ago

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.

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  1. Lukecrayonz
    • 3 years ago
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    Ever consider you shouldn't be in accelerated honors geometry?

  2. 321drew123
    • 3 years ago
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    No? This is actually the only topic we've covered that I don't understand. I feel like that was an insult...

  3. estudier
    • 3 years ago
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    Slope of line L gives you slope of perpendicular.....

  4. yummydum
    • 3 years ago
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    okay so you need to use the distance formula to find the distance between two points :) \[d=\sqrt {(y_2-y_1)+(x_2-x_1)}\]

  5. cgreenwade2000
    • 3 years ago
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    estudier? What?

  6. Lukecrayonz
    • 3 years ago
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    Find midpoint between the two points on the given line, use distance formula to find the distance between the given point and the midpoint.

  7. yummydum
    • 3 years ago
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    so using that you would get \[L=\sqrt{(-11+1)+(-3-11)}\]

  8. 321drew123
    • 3 years ago
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    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.

  9. Lukecrayonz
    • 3 years ago
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    No, Yummy, this is the correct way.

  10. 321drew123
    • 3 years ago
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    yummydum, thats the distance from an endpoint to the point, not the line.

  11. yummydum
    • 3 years ago
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    okay well go with what sire crayon has to saay

  12. Lukecrayonz
    • 3 years ago
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    You're finding a farther distance than needed

  13. yummydum
    • 3 years ago
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    i was getting to that

  14. 321drew123
    • 3 years ago
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    yeah

  15. estudier
    • 3 years ago
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    http://math.ucsd.edu/~wgarner/math4c/derivations/distance/distptline.htm

  16. Lukecrayonz
    • 3 years ago
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    http://screensnapr.com/v/14wXYK.jpg

  17. Lukecrayonz
    • 3 years ago
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    Explanation, answer is 8.6.

  18. Lukecrayonz
    • 3 years ago
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    @yummydum your distance was 12.17, much farther than the actual distance.

  19. 321drew123
    • 3 years ago
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    estudier that is not how i remember us learning it in school, we learned a shorter way

  20. estudier
    • 3 years ago
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    It is short, they are just explaining everything in great detail.

  21. yummydum
    • 3 years ago
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    again...that wasnt my final answer i was getting to the point...but i see uve got this covered

  22. Lukecrayonz
    • 3 years ago
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    estudier that makes it look very confusing :P

  23. 321drew123
    • 3 years ago
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    Ok i think i understand it now. Thanks Luke

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