Cyberchase S1:Ep2 The Borg of the Ring

They measured circles.  The outside and the inside.  How big across it was.  Hacker had a magic ring that wasn't his.  Someone else found it and Hacker came and stole it.  It was magic.  It could give him anything he wanted and do anything he wanted.  The kids got it back.  They built 2 of the same kind of ring, except they weren't magic, and they placed one of the not magic rings in the place of the magic ring and then took the magic ring.  Slider had a paper that told him how big the ring was.  That's how they copied it.  I learned if you want a wheel for a circle, it has to be a circle.  If you just want a circle then you have to measure a circle too.