Почему число ПИ (3.14) так важно?

In the real world, we often have to deal with various mathematical constants, and perhaps the most popular of them is deservedly the number Pi! Many people know that it is approximately 3.14 and that there are also numbers after the decimal point. Perhaps someone will even remember that using this number you can find the length of a circle, knowing its diameter. But what is so special about this number and how has it earned such unheard-of popularity? From this video you will learn why Pi is important and why it is needed at all! And if for some reason your teachers forgot to explain why Pi is needed, then this video is definitely for you. Let's go!