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kcla1996

  • 2 years ago

Find the distance between the two points. Round to the nearest tenth if necessary. (2, 5) and (–1, –5)

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  1. ash.vasvani
    • 2 years ago
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    Make a triangle, Pythagorean theorem.

  2. hartnn
    • 2 years ago
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    or you could use this : Distance between points (x1,y1) and (x2,y2) is \(\huge d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\)

  3. CliffSedge
    • 2 years ago
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    Distance formula is derived from Pythagoras' Theorem, I've found it's easier for students to remember the one formula than have to memorize another one.

  4. CliffSedge
    • 2 years ago
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    |dw:1349496154838:dw|

  5. CliffSedge
    • 2 years ago
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    It's easy enough to see what the lengths of the legs of the triangle are, then solve for the hypotenuse.

  6. kcla1996
    • 2 years ago
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    1?

  7. kcla1996
    • 2 years ago
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    Here are the choices: A. 1 B. 109 C. 10.4 D. 3

  8. kcla1996
    • 2 years ago
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    is 1 the correct answer?

  9. CliffSedge
    • 2 years ago
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    |dw:1349496503466:dw|

  10. CliffSedge
    • 2 years ago
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    1 doesn't seem very reasonable for points that far apart.

  11. kcla1996
    • 2 years ago
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    10.4?

  12. CliffSedge
    • 2 years ago
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    That seems more reasonable, but how can you be sure? What if it wasn't a multiple choice question and you had to provide an exact value, not just one rounded to the tenths' place?

  13. kcla1996
    • 2 years ago
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    oh i just counted how long the triangle's height was on the picture you drew, and i counted 10

  14. kcla1996
    • 2 years ago
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    is it right?

  15. CliffSedge
    • 2 years ago
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    Ah, no. You have to use Pythagorean Theorem to find the hypotenuse of the right triangle. |dw:1349498042456:dw| Or perhaps you would have been better off using the distance formula hart provided..

  16. kcla1996
    • 2 years ago
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    ok i'll try it....i'll tell you what i get

  17. kcla1996
    • 2 years ago
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    oh wait

  18. kcla1996
    • 2 years ago
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    how do i put (2,5) and (-1,-5) in that equation

  19. AriPotta
    • 2 years ago
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    coordinates are (x,y) so substitute the coordinates' x's and y's

  20. kcla1996
    • 2 years ago
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    109?

  21. hartnn
    • 2 years ago
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    yup, now don't forget to take aquare root.

  22. hartnn
    • 2 years ago
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    *square

  23. kcla1996
    • 2 years ago
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    oh thank you! so it's 10.4 :D

  24. hartnn
    • 2 years ago
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    welcome :)

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