" Pi ", "Square Pi", "Long Pi", "Triangular Pi".
1. The preface is that special conditions must be met. Under special conditions, find out its rules and common points. The common point of this rule is the cycle.
2. For example: Among all circle shapes, only the perfect circle is a special shape because it has countless lines of equal diameter.
Countless diameter lines are equal, this is the special condition.
3. For example: a square, among all square shapes, only the square is a special shape. It has 4 equal sides and also has 4 right angles with 90 degrees above the angles intersected by 2 diagonal lines.
This is the special condition for the square.
4. For example: a regular rectangle, among all rectangles, only the regular rectangle is a special shape. It has a length twice the width, or a width is one-half of the length, and also has 4 right angles of 90 degrees. This is its special condition.
5. For example: a regular triangle, among all triangles, only the regular triangle is a special shape. It has three sides that are equal, and the three inner corners are equal 60 degrees angles. This is its special condition.
6. Other shapes do not meet the above special conditions at all. So they have no rules and naturally have no common points, so other shapes have no cycle.
7. A perfect circle is to turn it from the diameter line to the perimeter and then find its rules and common points. What is the common point of this rule?
8. Square, turn it around from the side length to the diagonal to the perimeter and diagonal to be a circle, and then find out its rules and common points. What is the common point of this rule called the square circumference, abbreviated as "Square circumference".
9. A regular rectangle, turn it from long (side length) to diagonal to be a circle, and then find out its rules and common points. What is the common point of this rule? It is called the circumference of the positive rectangle, abbreviated as "Long circumference".
1. A regular triangle, from the side to the middle line, then to the perimeter and the middle line, turn it into a circle, and then find out its rules and common points. What is the common point of this rule called the circumference of the regular triangle, abbreviated as "Triangle Perspective".
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