Mass Points Geometry Part 1

Daniel teaches us about a new useful tool to be used in geometry called "Mass Points".

[danielliu]

I need to learn how to not spit in the microphone *shame*

[mathdude]

Dude, your a bloody legend. I actually made chapter countdown. YaY!

[shreya]

So I pretend that the triangle is a bunch of seesaws?
And do those numbers as weights REALLY exist?

[queols]

I didn't understand how C is 11/5; doesn't that provide AE=EC=1 because A=1 and E=16/5, if C=11/5 then E=1.A+1.C

[Torcika]

At min 3:00, shouldn't it be x+4x = 5?I mean, you are changing the pivot point to BT/TE and the weight at is (a + b)=x+4x.also, if you are to add the lenghts shouldn't it be BT + TE =4 +1=5?

[newtonian]

Question: shouldn't it be x+4x = 5, since the sum of the lengths is 5?

[warmpianist]

Are there any proofs that this technique works?