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Calculating a circle is actually pretty easy. There are a few formulas and with a bit of practice you can use them quickly and safely. But that's usually not enough in math. You're supposed to understand what it's all about. But who can really imagine what pi is? There are so many experiments and exercises you can do with the number circle that make it much easier to get to grips with calculating circles and understand pi. I'll explain it to you in this video and also go into some important formulas. Have fun learning! *** You can watch the presentation again here: http://prezi.com/d40vny9ci0ku/?utm_ca... *** Direct to the channel: / schoolseasy Facebook: / schoolseasy Twitter: / schoolseasy *** You can find more math videos here: • Math