Symbol refers to the symbol or mark agreed by * * * to express a certain meaning, which comes from the stipulation or agreement. Its form is simple, diverse, widely used and has strong artistic charm.
The invention and use of mathematical symbols are later than numbers, but their number exceeds numbers. There are more than 200 mathematical symbols commonly used in modern mathematics, and each symbol has an interesting experience.
In the process of proving geometry problems, because the symbols are: two points above and one point below. So the symbol is: one point above, two points below.
The symbol of "because" in mathematics is: trapped as: ∵, so: ∴. In mathematics, because of sum, it is often used to prove the logic of mathematical relations. For example, to prove that a quadrilateral is a parallelogram, we must first prove that the corresponding two groups of sides are parallel, so it is a parallelogram. Mathematically, it can be expressed as: two groups of opposite sides are parallel, and ∴ is a parallelogram.