What is Triangle?

Triangle

Let's say beforehand that this is not an article post, but it's a matter of urgency. Basically what is the triangle, its definition is written in the post.

The common definition of the triangle in us is: "The three areas constrained by the trunk of the triangle." This definition is not correct. Because it is defined as the triangle area, it is not defined by the triangle. So, according to my knowledge, the best of the triangle and my preferred definition is: "Three points are located on the same plane but not in the horoscope, adding them in phases, the shape formed is called triangle."

Another One Man Say's: If there are three points, it will be either a line or the sum of the two sides. To be triangle, it must be the sum of the unequal and arm 1 = a, the arm 2 = b, and the arm 3 = c.
If you want, you can do many conditions, 3 degrees of the sum of 180 degrees, whether it is the right angle or what the triangle can be. 3 points that are unequal, adding 3 sides created by the point 3, making them in real field, one in the figure,
Defination means there is no problem in giving you all the information here. If you give all the conditions properly, your deficiency will not be wrong.
From now on, we depend on memorandum because we know the triangle, quadrilateral in class one or before.
Do not understand the geography, angle, arms, fields.
The lesser the expression of the mind, the less likely it will be to go wrong.

If you have any flaws, then forgive them and look forward to reform.