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Educational video for children to learn what a circle and circumference are and their differences, as well as what pi is. A circumference is a curved, closed, flat line whose points are the same distance from the center. A circle is a flat figure delimited by a circumference. The difference between a circumference and a circle is that the circumference is the line that surrounds the circle, and the circle is everything that is inside the circumference. Pi is a mathematical constant that indicates the relationship between the perimeter and the diameter of a circle. We say it is a constant because in all the circumferences of the world, pi is always the same number: 3.14. In this video, children can see several examples that demonstrate the constant through easy and fun calculations. Welcome to the Smile and Learn educational channel! If you want children to smile and learn, this is your channel. SUBSCRIBE! You will discover unique, fun and educational material for children aged 2 to 12. You can find stories about values, videos with educational content (geography, history, letters, science, etc.), videos about emotions, yoga... And much more! All videos and stories come from our Smile and Learn educational app platform. Here you will discover more than 100 interactive games and stories for children, designed by educators. For more information, go to www.smileandlearn.com and DOWNLOAD the app, you won't regret it! -Apple Store: http://bit.ly/smart_library-smileandl... -Google Play: http://bit.ly/smart_library-smileandl...