Divide a square with an edge length of 8 cm into two rectangles of the same size and shape. What is the surface area of each rectangle Such as the title One l

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• 1. What is the surface area of a cuboid made up of a square with three edges 8 cm long?
• 2. Cut a cube with an edge length of 8 cm into two cuboids. What is the total surface area of the two cuboids?
• 3. Three years ago, my father's age was five times that of Xiaoli. Five years later, my father's age is three times that of Xiaoli. How old is Xiaoli this year? I want the process of arithmetic! Besides, I don't know the quadratic equation of two variables!
• 4. In △ ABC, a = 7, B = 43, C = 13, then the minimum angle is () A. π3B. π6C. π4D. π12
• 5. A = 2, CoSb = 3 / 5, C = 45 ° to find the area of triangle ABC Solving problems with cosine theorem
• 6. In triangle ABC, angle a = 108 degrees, angle c-angle B = 28 degrees, then angle C=
• 7. It is known that ABC is the length of three sides of a triangle. Try to compare the size of a square + b square + C square and 2BC
• 8. In the triangle ABC, if the lengths of three sides are a, B and C respectively, and the square of a + 2Ab = the square of C + 2BC, then the triangle ABC is a triangle
• 9. In the triangle ABC, a, B and C are the opposite sides of ∠ a, B and C respectively. Try to compare the square of a-b-c and the square of 2BC
• 10. If a, B and C are the three sides of triangle ABC, and 3 (a square + b square + C Square) = (a + B + C) square, judge the shape of triangle ABC?
• 11. Four edges are 8 cm long square, put together into a rectangle, what is the surface area
• 12. How many square centimetres is the surface area of a rectangle made of 3 squares with 8 cm edges?
• 13. Xiao Li uses a rectangular piece of paper with a length width ratio of 3:2 and an area of 420cm to cut a square piece of paper with an area of 324 square centimeters along the direction of the edge. You can help Xiao Li calculate. Can she use a large piece of paper to cut a small piece of paper?
• 14. Xiao Li wants to cut a rectangular piece of paper with an area of 30 square centimeters on a square piece of paper with an integer length, and make its length and width 2:1. Question: how long is the side length of Xiao Li's square piece of paper at least?
• 15. Xiao Li wants to use a square piece of paper with an area of 400 square centimeter to cut a rectangular piece of paper with an area of 300 square centimeter along the direction of the side, so that its length width ratio is 3:2. I don't know if it can be cut out, but she is worried. Xiao Ming said, "don't worry, you can cut a small piece of paper with a large piece of paper." do you agree with Xiao Ming? Please give reasons
• 16. Xiao Fang and Li live in the same building. Xiao Fang lives on the sixth floor and Xiao Li lives on the fifth floor. Xiao Li has to walk 100 steps every day. How many steps does Xiao Fang walk every day?
• 17. My father is 24 years older than Xiao Li. Three years ago, my father was three times older than Xiao Li. Xiao Li, how old is my father this year,
• 18. The two heights of ABC are 4 and 12 respectively. If the height of the third side is also an integer, then the longest one may be () A. 4B. 5C. 6D. 7
• 19. The lengths of the two heights of the unequal triangle ABC are 4 and 12 respectively. If the length of the third height is also an integer, then the length of this height is equal to______ ．
• 20. Xiaoli bought a total of 10 stamps with 60 cents and 80 cents. For 7 yuan and 20 cents, she bought a stamp with 60 cents______ I bought 80 cent stamps______ There are two