It is known that the perimeter of a parallelogram is 20 cm. A diagonal divides it into two triangles with a perimeter of 16 cm. How many cm is the diagonal?

The perimeter of the parallelogram is 20 cm,
A group of adjacent edges is 10cm
The perimeter of two triangles divided by a diagonal = a group of adjacent sides + diagonal length = 10 + diagonal length = 16 cm
The diagonal length is 6cm

If the perimeter of the parallelogram is equal to 56cm and the ratio of the two adjacent sides is 3:1, the length of the longer side of the parallelogram is______ cm．

∵ quadrilateral ABCD is a parallelogram, ∵ AB = CD, ad = BC, ∵ the perimeter of the parallelogram is equal to 56cm, ∵ AB + CD + AD + BC = 56cm, ∵ AB + BC = 28cm, ∵ BC: ab = 3:1, ∵ BC = 21cm, ab = 7cm, ∵ the longer side of the parallelogram is 21cm

RELATED INFORMATIONS

1. A circle with a circumference of 6.28dm can be divided into several equal parts to form a parallelogram. The bottom of the parallelogram is equivalent to______ Yes______ The height of a parallelogram is equal to______ Yes______ cm．
2. If the perimeter of parallelogram ABCD is 32,5ab = 3bC, the value range of diagonal AC is ()
3. As shown in the right figure, in the parallelogram ABCD, we know that ad = 8 and perimeter is equal to 24, then we find the lengths of the other three sides
4. As shown in the figure, ▱ the diagonal lines AC and BD of ABCD intersect at point O, point E is the midpoint of CD, and the perimeter of △ abd is 16cm, then the perimeter of △ DOE is______ cm．
5. In triangle ABC, angle B = angle c = 36 degrees, angle ade = angle ade = 72 degrees, then the number of isosceles triangles in the graph is?
6. For a piece of land as shown in the figure, ad = 12M, CD = 9m, ∠ ADC = 90 °, ab = 39m, BC = 36m, calculate the area of this land
7. For a piece of land as shown in the figure, ad = 12M, CD = 9m, ∠ ADC = 90 °, ab = 39m, BC = 36m, calculate the area of this land
8. In the quadrilateral ABCD, ab ∥ CD, AC bisects ⊥ DAB, ad = BC, AC ⊥ BC, ⊥ DAB = ⊥ B, ab = 4cm
9. A cuboid of 7cm in length, 6cm in width and 5cm in height is cut into two equal cuboids so that the sum of the surface areas of the two cuboids is the largest What's the maximum? What's the minimum? (to be comprehensive)
10. Cut a cuboid of 7cm in length, 6cm in width and 5cm in height into two cuboids so that the two cuboids have the largest surface area. What is the sum of the surface products of the two cuboids
11. If the perimeter of parallelogram is 48mm and the diagonal intersects o, the perimeter of triangle AOB is 4mm longer than that of triangle BOC, then the lengths of AB and BC are equal to?
12. The diagonals AC and BD of parallelogram ABCD intersect at O, e and F, which are two points on DB, and de = BF I'm sorry to trouble you to copy it,
13. Known: as shown in the figure, the quadrilateral ABCD is a parallelogram, e and F are two points on the straight line BD, and de = BF. (1) prove: AE = CF; (2) connect AF and CE, then is the quadrilateral afce a parallelogram?
14. It is known that the perimeter of the parallelogram ABCD is 50cm, the diagonals intersect at point O, the perimeter of △ AOB is 5cm longer than that of △ BOC, and the lengths of AB and BC are calculated No picture
15. As shown in the figure, in ▱ ABCD, the diagonal AC = 21cm, be ⊥ AC, the perpendicular foot is e, and be = 5cm, ad = 7cm, then the distance between AD and BC is______ cm．
16. There is a little E in the quadrilateral ABCD,
17. In trapezoidal ABCD, AD / / BC, ∠ ABC = 60 °, DCB = 30 °, ab = 4, BC-AD is calculated
18. In trapezoidal ABCD, ad ∥ BC, ab = 4, BC = 9, CD = 5, Da = 6. (1) prove ab ⊥ BC; (2) find the area of trapezoidal ABCD
19. As shown in the figure, in trapezoidal ABCD, ∠ d = 90 ° and M is the midpoint of ab. if cm = 6.5 and BC + CD + Da = 17, the area of trapezoidal ABCD is () A. 20B. 30C. 40D. 50
20. In the trapezoidal ABCD, ab = CD, e is the midpoint of AD