My Math Forum  

Go Back   My Math Forum > College Math Forum > Topology

Topology Topology Math Forum


Thanks Tree1Thanks
  • 1 Post By skipjack
Reply
 
LinkBack Thread Tools Display Modes
May 25th, 2017, 10:31 AM   #1
Newbie
 
Joined: May 2017
From: Germany

Posts: 5
Thanks: 0

Determine proportion of two lines in a triangle

Hey there.

I'm a second semester maths student. I currently have one lecture which I'm not keeping up with because it's a) terrible, it makes me angry, and b) about the topic I'm least interested in, however do still plan to pass the exam this semester, hence why I need help solving this assignment. I think the image is quite self-explanatory; I need to determine the length of x relative to c. The lower and right line are obviously cut with 2:1 proportion but the third isn't.



There is a proof (it probably has some elegant name in English, but I wasn't able to find it) about the centerpoint of a triangle. Here is an image of that one:



The proof isn't too difficult and I understand how it works; however I haven't been able to do something similar for my case.

Alright, so that's the problem. Any help is greatly appreciated!

Last edited by skipjack; May 25th, 2017 at 12:21 PM.
sty silver is offline  
 
May 25th, 2017, 12:25 PM   #2
Global Moderator
 
Joined: Dec 2006

Posts: 17,491
Thanks: 1315

Have you swapped "2a" and "4a"? Anyway, apply Ceva's theorem.
Thanks from sty silver
skipjack is offline  
May 25th, 2017, 10:00 PM   #3
Newbie
 
Joined: May 2017
From: Germany

Posts: 5
Thanks: 0

Quote:
Originally Posted by skipjack View Post
Have you swapped "2a" and "4a"? Anyway, apply Ceva's theorem.
No, it's 2a.

Yeah, that's theorem covers it, now I can certainly get it done. Thanks.
sty silver is offline  
Reply

  My Math Forum > College Math Forum > Topology

Tags
determine, geometry, lines, proportion, triangle



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Are angles in similar triangle in the same proportion as the sides? randomgamernerd Geometry 7 November 14th, 2015 08:23 PM
Determine the type of triangle by its medians sf7 Geometry 3 June 14th, 2014 04:04 AM
Formula to determine value of Y in a triangle afonsolage Algebra 12 December 28th, 2013 05:49 AM
Need simple help to determine angles in right triangle? MathNoobGuy Algebra 4 March 1st, 2012 11:32 AM
Find curve with tangent and normal lines, form triangle Shamako Calculus 1 October 10th, 2011 08:04 PM





Copyright © 2017 My Math Forum. All rights reserved.