anonymous
  • anonymous
Find the distance between the two points. Round to the nearest tenth if necessary. (2, 5) and (–1, –5)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Make a triangle, Pythagorean theorem.
hartnn
  • hartnn
or you could use this : Distance between points (x1,y1) and (x2,y2) is \(\huge d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\)
anonymous
  • anonymous
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.

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More answers

anonymous
  • anonymous
|dw:1349496154838:dw|
anonymous
  • anonymous
It's easy enough to see what the lengths of the legs of the triangle are, then solve for the hypotenuse.
anonymous
  • anonymous
1?
anonymous
  • anonymous
Here are the choices: A. 1 B. 109 C. 10.4 D. 3
anonymous
  • anonymous
is 1 the correct answer?
anonymous
  • anonymous
|dw:1349496503466:dw|
anonymous
  • anonymous
1 doesn't seem very reasonable for points that far apart.
anonymous
  • anonymous
10.4?
anonymous
  • anonymous
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?
anonymous
  • anonymous
oh i just counted how long the triangle's height was on the picture you drew, and i counted 10
anonymous
  • anonymous
is it right?
anonymous
  • anonymous
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..
anonymous
  • anonymous
ok i'll try it....i'll tell you what i get
anonymous
  • anonymous
oh wait
anonymous
  • anonymous
how do i put (2,5) and (-1,-5) in that equation
AriPotta
  • AriPotta
coordinates are (x,y) so substitute the coordinates' x's and y's
anonymous
  • anonymous
109?
hartnn
  • hartnn
yup, now don't forget to take aquare root.
hartnn
  • hartnn
*square
anonymous
  • anonymous
oh thank you! so it's 10.4 :D
hartnn
  • hartnn
welcome :)

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