April 22nd, 2017, 10:26 AM  #1 
Newbie Joined: Apr 2017 From: finland Posts: 3 Thanks: 0  Triangles angle
Hello folks ! I have this problem I have tried to figure out. So, Triangle have two angles which differs from each others by 45 degrees opposite sides of those two angles are 5 and 2 what is the length of the longest side ? 
April 22nd, 2017, 01:07 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,771 Thanks: 862 
What do you get if angles are 90, 22.5 and 67.5?

April 22nd, 2017, 02:10 PM  #3 
Newbie Joined: Apr 2017 From: finland Posts: 3 Thanks: 0 
Yep, It seems like right. Didn't notice we got answers for those problems. 5,4m is length of hypotenuse and angles are 21,5.. 66,5.. and 91,9.. Well, thanks for help though Last edited by skipjack; April 22nd, 2017 at 07:45 PM. 
April 22nd, 2017, 03:25 PM  #4 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,771 Thanks: 862 
No... sum of angles in a triangle = 180 degrees.

April 22nd, 2017, 07:48 PM  #5 
Global Moderator Joined: Dec 2006 Posts: 19,190 Thanks: 1649 
The triangle isn't rightangled, so "hypotenuse" isn't the correct term for the longest side. The answers are correct, but should be found to at least three significant figures.

April 23rd, 2017, 05:14 AM  #6 
Newbie Joined: Apr 2017 From: finland Posts: 3 Thanks: 0 
Well, I didn't know you can't say hypotenuse if the triangle isn't rightangled Also, there were more than three significant figures  I just dropped them out. Good to have forum like this. Know where to turn if math problems get too sticky. Last edited by skipjack; April 23rd, 2017 at 06:02 AM. 
April 23rd, 2017, 05:32 AM  #7 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,771 Thanks: 862 
hypotenuse [hahypotnoos, yoos] noun, Geometry. the side of a right triangle opposite the right angle. Tattoo that on your left arm... 

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