I just found this stop motion animation that I made last year when I was playing around with the iStopMotion software. So I uploaded it to YouTube and posted it here for you all to see. It is not the highest quality, but it was fun to make.

It shows the Greek method of relating the area to the circumference of a circle.

In the most recent @maanow Monthly: increasing funct f:[a,b]→[f(a),f(b)] has maximum arclength b-a+f(b)-f(a) iff f'(x)=0 almost everywhere. 20 hours ago