July 10th, 2015, 03:47 PM  #1 
Newbie Joined: Jul 2015 From: United States Posts: 14 Thanks: 0  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?  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. 
July 10th, 2015, 04:45 PM  #2 
Math Team Joined: Nov 2014 From: Australia Posts: 689 Thanks: 244 
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.
Last edited by skipjack; July 11th, 2015 at 12:15 AM. 
July 10th, 2015, 04:46 PM  #3 
Newbie Joined: Jul 2015 From: United States Posts: 14 Thanks: 0 
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 
July 10th, 2015, 04:48 PM  #4 
Newbie Joined: Jul 2015 From: United States Posts: 14 Thanks: 0  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. 
July 11th, 2015, 12:17 AM  #5 
Global Moderator Joined: Dec 2006 Posts: 20,916 Thanks: 2199 
Remember the units: 6.4 kilometers.


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