How many different spellings are there? What are their girth? Spell them, and fill in the table ───────────── Length / cm ───────────── Width / cm ───────────── Circumference / cm ─────────────……

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• 1. 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?
• 2. How to make a big rectangle with four rectangles 5cm long and 3cm wide? Calculate the perimeter of the rectangle
• 3. 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,
• 4. Use two rectangles 4 cm long and 3 cm wide to form a large rectangle. What is the circumference of the large rectangle?
• 5. 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
• 6. 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
• 7. Use 9 squares with side length of 4cm to make a big square. How many centimeters is the perimeter of the big square/
• 8. 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
• 9. 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?
• 10. 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?
• 11. Use 12 squares with side length of 1 decimeter to spell a rectangle. How many spelling methods are there for this rectangle? What are their perimeter? I am a primary school student
• 12. Use 18 same small squares to make a rectangle. Use 18 squares each time. There are several kinds of spelling
• 13. Use eight small squares to make a rectangle, several spelling methods
• 14. How many different spelling methods are there to make a large rectangle with 18 small squares of one square centimeter? What is the circumference of the rectangle with the largest circumference
• 15. How many centimeters is the circumference of the two rectangles that are 6 cm long and 4 cm wide? (think about it. There are several spellings.)
• 16. Use 210 small squares with side length of 2 cm to make a rectangle. How many spelling methods do you share?
• 17. Use 18 identical small squares to form a rectangle, which can have______ There is a spelling
• 18. Use a rectangle 4 cm long and 3 cm wide to make a square as shown in the figure below. What is the minimum side length of the square? (you can draw a picture in the picture first, then calculate)
• 19. Use rectangular paper of 4cm in length and 3cm in width to make a square. What is the minimum side length of the square? At least how many rectangular papers can make a square
• 20. Use a small square of 1 square centimeter to make different patterns with an area of 6 square centimeter and a perimeter of 12 cm. You can spell several patterns It's on a roll, and I don't think I can spell it. If anyone thinks they can, help draw a picture,