What is the circumference of the circle, what their differences and examples of these shapes of life

School time for most adults is associated with a carefree childhood. Of course, many are reluctant to attend school, but only where they can obtain basic knowledge that will later help them in life. One such question is, what is the circumference of the circle. To confuse these concepts simply, because the words are cognate. But the difference is not so big as it may seem to an inexperienced child. Kids love this theme because of its simplicity.

What is the circumference?

A Circle is a closed line every point of which is equidistant from the center. The most striking example of the circle is a Hoop, which is a closed body. In fact, speaking particularly about the of a circle is not necessary. The question of what is the circumference of a circle is much more interesting than the second part.

What is the circle?

Imagine that you decided to paint the figure above is a circle. You can choose any color: blue, yellow or green - who is closer to their liking. And you started to fill the void with something. After it was over, we get a figure called a circle. In fact, a circle is a part of the surface outlined by the circle.

The circle has some important parameters, some of which are also typical for the circle. The first is the radius. Them is the distance between the center point of the circle (or circumference) and the circumference that creates a boundary circle. The second important characteristic that is repeatedly used in school tasks is the diameter (i.e. the distance between opposite points on the circle).

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And finally, a third feature inherent in the circle is a square. This property is specific only for him, a circle is not square due to the fact that it does not have anything inside, and the center, unlike the circle, is rather imaginary than real. In the circle it is possible to establish a clear center through which to conduct a series of lines that divide it into sectors.

Examples of a circle in real life

Actually possible items that can be called a kind of circle, that's enough. For example, if you look at the wheel of a car right, here's an example of a finished circle. Yes, it does not need to be filled in solid, it is possible different patterns inside of it. The second example of the circle - the sun. Of course, to see it will be hard, but it is out looks like a small circle.

Yes, the star, the Sun is not a circle, it has a volume. But the very sun that we see above our heads in the summer, is a typical circle. However, the area had still calculating will not work. After all, its comparison with the terms provided for illustration only, to make it easier to understand what is the circumference of the circle.

Differences between the circumference of the circle

So what conclusion can we do? What is the circumference of the circle, so that the latter is the area, and in most cases a circle is the boundary circle. Although there are exceptions at first glance. It may seem sometimes that there is no circle in the circle, but it's not. In any case, something. Just a circle can be very small, then it is not visible to the naked eye.

Also, the circumference can be what distinguishes a circle from the background. For example, in privedena the image above, the blue circle is on a white background. And this is the trait by which we understand that here starts figure, and is called the circumference. Thus, the circumference is the boundary of the circle. That's the difference between the circumference of the circle.

What is the sector?

Sector is the sector of the circle that is formed by two held him on the radii. To understand this definition, you just need to remember pizza. When it is cut into equal pieces, all of them are sectors of a circle which is presented in the form of this delicious dish. It is completely optional sectors must be equal. They can be of different sizes. For example, if you cut off half the pizza, it will also be a sector of this circle.

The Item displayed by this notion, can only have a circle. Circumference (radius is also possible to hold, of course, but after that it will become a circle) is not square, and therefore the sector to allocate will fail.

Insights

Yes, the theme of the circle and the circle (what it is) very easy to understand. But in General, everything that concerns these geometric shapes is the most difficult to learn. Student must be prepared for the fact that the circle - the figure of a whimsical. But as they say, it's hard to exercise - easy in battle. Yes, geometry is a complex science. But successful development of lets make a small step in the direction of success. Because of the efforts of when training can not only to fill up the Luggage of their knowledge, but also to gain important life skills. Actually, this is school. And the answer to the question, what is the circumference of a circle is a secondary, though important.