User blog comment:Primexit/Math problem of the week (3)/@comment-29331244-20151211133700/@comment-24808864-20151212204635

I tried to make a video using some new software I am playing with, but it turned out pretty terrible! Oh well, I will post in our video library if anyone is interested: http://khanacademy.wikia.com/wiki/Special:Videos?file=Tibet%27s_armour