Many people mistakenly believe that for the first time they meet geometric shapes in high school. There they study their names, properties and formulas. But in fact, since childhood, any object that a child sees, senses, smells, or interacts with it in any other way, is precisely a geometric figure. The couch on which the woman who has just given birth lies - a rectangle, a lamp, which gives the obstetricians light - a round figure, window panes in the window - squares. This list goes on and on.
Geometric figures, directly as an element of science, are first encountered by schoolchildren in the middle classes. You could even say that geometry begins with them. However, as mentioned above, the first interactions with them occur long before that. Take the point, for example. She is the smallest figure in geometry. In addition, it is considered to be the basis of all the others (like atoms in chemistry). All triangles, squares and other shapes in any drawing consist of many points. They have certain properties, each of which is inherent in only one figure (no other can be endowed with them).
It can be assumed that all geometric shapes consist directly of lines, but what is it? This is a lot of points arranged in a row. They can be continued indefinitely, because the straight line does not end. If it is bounded on both sides, then it is customary to call it a segment. If there is only one limitation, then you have a ray. Consequently, all planar figures in geometry consist of segments, since the components have both an end and a beginning. It is worth noting that the line, which was divided by a point, is two rays directed in opposite directions to each other.
Not only does geometry consist of flat elements, there are also volumetric geometric shapes. They start studying them at school later, closer to graduation, but a person encounters them, again, much earlier. For example, when a child picks up a cube, he holds a cube in his palms. Or, if he looks at the chest of drawers, then in front of him is a rectangular box. All three-dimensional figures consist of planes (that is, it is an indefinite primary concept, like a straight line). The same box consists of six such elements. You can visually familiarize yourself with the plane by looking at the surface of any table. But this will be only part of it, since there are limitations. The plane itself is as infinite as a straight line.
Thus, there is no sphere where geometric figures do not meet. Their names are different, they determine the properties and features. For example, the triangle area formula is not suitable for a rectangle or square.
It is advisable to attach the child to geometric shapes at a preschool age. You can make them with your own hands, and then lay out various drawings on paper (if these are flat elements). However, do not give up on volumetric figures. On the Internet you can find many didactic games related to this. But you can’t postpone getting to know them, because all we see is geometric shapes. Even a person consists of them!