Representation of a set of parallelograms by description

What are the parallelogram's letters

RELATED INFORMATIONS

1. What properties of parallelogram can be used to describe the set of all parallelogram?
2. How to express the set of parallelogram?
3. The set of parallelograms Using characteristic property description method
4. The three forces are 68.12n, and the resultant force range is calculated
5. How to find the range of resultant force of three forces
6. The resultant range of three forces If the third force is not in the range of the first two forces, what is the minimum value of the resultant force If the third force is not in the range of the first two forces, it cannot be zero
7. 1 / 2 times (2 / 8 + 1 / 24 + 2 / 48... + 2 / 360)
8. 3x^2-[5x-(2/1x-3)+2x^2]=
9. Simple calculation of 49 + 49 × 49
10. If the system of inequalities: 1 < x ≤ 2 x > m has a solution, then the range of M is a.m
11. To describe the set of parallelogram by enumeration
12. Several drawing methods of parallelogram
13. The method of proving parallelogram
14. How to prove parallelogram
15. There are several ways to cut a parallelogram into a rectangle
16. There are several ways to divide a parallelogram into three parts
17. What is the relationship between the two equations (the square of x) + PX + q = 0, Q * (the square of x) + p * x + 1 = 0
18. If the quadratic equation of one variable x + PX + q = 0 is negative, then () A.P > 0 and Q > 0 B.P > 0 and c.0 and Q > 0 D.P
19. It is known that angle a is an internal angle of triangle ABC, and sinA.cosA Is the two roots of the equation 2x-2x + P = 0, try to determine the shape of the triangle
20. We know that the two roots of the equation x ^ 2-px + 1 = 0 (P belongs to R) are X1 and X2, and | x1 | + | x2 | = 3