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July 10th, 2015, 03:47 PM   #1
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Post Pythagorean Theorem Question

Julian jogs 2 kilometers east, 4 kilometers north, and then 7 kilometers west.
How far is Julian from his starting position, to the nearest tenth of a kilometer?


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I don't know if I'm burnt from studying all day and can't see whether or not this is actually an easy question, but I drew what it says above like this:



Someone please clarify this for me?

Last edited by littleredstar; July 10th, 2015 at 03:54 PM.
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July 10th, 2015, 04:45 PM   #2
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That's correct. Now you need to know how far west (from his starting position) and how far north (from his starting position) he went, and use Pythagoras.
Thanks from littleredstar

Last edited by skipjack; July 11th, 2015 at 12:15 AM.
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July 10th, 2015, 04:46 PM   #3
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Nvm I figured it out.



I added 5 to the line so I can create a right triangle and make the hypotenuse be the distance I need. So i did:

5^2+4^2=C^2
25+16=41
C^2=41
C=Square root of 41=6.403....
Rounded to the nearest tenth, this equals 6.4
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July 10th, 2015, 04:48 PM   #4
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Quote:
Originally Posted by Azzajazz View Post
That's correct. Now you need to know how far west (from his starting position) and how far north (from his starting position) he went, and use Pythagoras.
We responded at the same time when I figured it out, lol. But thank you for the response anyway

Last edited by skipjack; July 11th, 2015 at 12:15 AM.
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July 11th, 2015, 12:17 AM   #5
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Remember the units: 6.4 kilometers.
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