The perimeter of the round table cloth is 3.768 meters. Please design a square tablecloth. The edge of the tablecloth should be at least 40 cm lower than the edge of the table. What is the side length of this tablecloth?

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• 1. The diameter of the round dining table is 2 meters and the height is 0.8 meters. The four corners of the square plastic tablecloth on the table just touch the area of the plastic tablecloth on the ground
• 2. A square tablecloth with side length a is placed on a round table with diameter B (a > b). If the maximum length of the four corners of the tablecloth is equal, the maximum length is () A. 2a−bB. 2a−b2C. 22a−b2D. 22a−b
• 3. A round dining table, the diameter of the round table is 2 meters, the table is covered with a round tablecloth, the tablecloth from the table hanging distance is 40 cm Glass round turntable (placed in the center of the table). The edge of the turntable is 30 cm away from the edge of the round table
• 4. A round table with a diameter of 10 decimeters should be paved with a round tablecloth with a diameter 45 meters larger than the table top. What is the area of this tablecloth
• 5. The round dining table is 1.6m high, the table top is 1.4m in diameter, and the four corners of the square tablecloth just touch the diagonal line of the square tablecloth on the opposite side?
• 6. Mother is going to buy a square tablecloth for the round dining table. The diameter of the round table is 2 meters, and the height of the table is 1.5 meters Then if you want to make: the four corners of the square tablecloth on the table just touch the ground, how long should the diagonal of the square tablecloth be
• 7. My mother is going to buy a square tablecloth for the round table. The diameter of the round table is 1.4 meters. If the four corners of the square tablecloth are just under the table Drop 40 cm, mother needs to buy how large a square tablecloth?
• 8. Mom is going to buy a square tablecloth for the round table at home. The diameter of the round table is 1.2 meters, and the height of the table is 0.9 meters. If you want to make the four corners of the square tablecloth on the table just touch the ground, how long should the diagonal of the square tablecloth be?
• 9. Xiaoming's dining table is round. Mother wants to match the dining table with a square tablecloth. The diameter of the table is 1.5 meters and the table is high 1.2 meters, to make a square tablecloth
• 10. The space quadrilateral ABCD is cut by a plane, e, F, G and H are respectively on AC, CB, BD and DA, and the section efgh is rectangular
• 11. A square tablecloth with a side length of a is laid on a flat surface with a diameter of B (a > b). If the maximum length of the tablecloth drooping at the four corners is equal, what is the maximum length?
• 12. There are two square tablecloths, both of which are 1m long. Xiaoming's bought a 1.3 square tablecloth, you can put it together, there is no cloth left! Three methods
• 13. Use 9 squares with side length of 4cm to make a big square. How many centimeters is the perimeter of the big square/
• 14. Use four rectangles of the same size and a small square to form a large square with a side length of 16 meters, and calculate the perimeter of each rectangle
• 15. Use four rectangles of the same size and a small square to make a large square with a side length of 13dm. What is the perimeter of each rectangle
• 16. Use two rectangles 4 cm long and 3 cm wide to form a large rectangle. What is the circumference of the large rectangle?
• 17. Use four rectangles that are 5cm long and 3cm wide to make a big square. How can you spell them? First, draw different spelling methods,
• 18. How to make a big rectangle with four rectangles 5cm long and 3cm wide? Calculate the perimeter of the rectangle
• 19. How many kinds of rectangles can be made out of 24 square pieces of paper with 1cm sides? Row by row, what is the maximum perimeter of a rectangle?
• 20. How many different spellings are there? What are their girth? Spell them, and fill in the table ───────────── Length / cm ───────────── Width / cm ───────────── Circumference / cm ─────────────……