It is known that the perimeter of the diamond is 16cm, and there is an internal angle of 60 degrees, then the shorter diagonal length of the diamond is______ cm．

It is known that the shorter diagonal and two adjacent sides form an equilateral triangle, then the shorter diagonal length of the diamond = the side length of the diamond = 16 △ 4 = 4cm

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1. If the perimeter of the diamond is 8 cm and the height is 1 cm, what are the degrees of the two adjacent inner angles in the diamond?
2. If the perimeter of the diamond is 8 cm and the height is 1 cm, what is the degree ratio of the two collar angles of the diamond?
3. If the perimeter of a diamond is 8 cm and the height is 1 cm, the ratio of the degrees of the two adjacent angles of the diamond is 0——
4. As shown in the figure, in square ABCD, ∠ EDF = 45 ° and the two sides of ∠ EDF intersect AB and BC respectively at e and F. try to explore the quantitative relationship between AE, EF and CF, and prove your conclusion
5. Square ABCD, AE + CF = EF, verification ∠ EDF = 45 degree
6. As shown in the figure, in the quadrilateral ABCD, ab = CD, BF = De, AE ⊥ BD, CF ⊥ BD, e and f respectively. (1) prove: △ Abe ≌ △ CDF; (2) if AC and BD intersect at point O, prove: Ao = Co
7. As shown in the figure, e and F are two points on the diagonal BD of the quadrilateral ABCD, AE ‖ CF, AE = CF, be = DF
8. As shown in the figure, e and F are two points on the diagonal BD of the quadrilateral ABCD, AE ‖ CF, AE = CF, be = DF
9. As shown in the figure, e and F are two points on the diagonal AC and BD of rectangle ABCD, and AE = DF. Prove the congruent triangle COF of triangle BOE
10. As shown in the figure, in square ABCD, ∠ DAF = 25 °, AF intersects diagonal BD at e, intersects CD at F, then ∠ bec=______ Degree
11. If the perimeter of the diamond ABC is 16cm and an internal angle is 30 °, the area of the diamond ABC is
12. The perimeter of the diamond is 16cm, and one of its internal angles is 150 degrees?
13. The diamond has an area of 32 square centimeters, and an internal angle of 30 degrees. What is the perimeter of the diamond
14. If the perimeter of the diamond is 40cm and the ratio of the two adjacent angles is 1:2, the length of the shorter diagonal depends on the process
15. If the perimeter of the diamond is 8 cm and the height is 1 cm, the degree ratio of the two adjacent angles of the diamond is 0 How to prove it? What is the definition? Is the 30 degree angle of a right triangle equal to half of the hypotenuse?
16. If the perimeter of the diamond is 8cm and the height is 1cm, then the degree ratio of the two adjacent angles of the diamond is?
17. If the perimeter of the diamond is 8cm and the ratio of degree of two adjacent angles is 1:2, the area of the diamond is
18. If the perimeter of the diamond is 40 cm and the ratio of the degrees of two adjacent internal angles is 1:2, the area of the diamond is 40 cm___ cm．
19. It is known that the perimeter of the diamond is 16cm, and the area is 8cm ^ 2
20. If the perimeter of the diamond is 16cm and the degree ratio of two adjacent angles is 1:2, the area of the diamond is () A. 43cm2B. 83cm2C. 163cm2D. 203cm2