The perimeter of a rectangle is 150cm, and the ratio of length to width is 3 / 4:3 / 5? Please list the formula

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• 1. The area of a rectangle is 20cm. The ratio of length to width is 2:3. What are the length and width?
• 2. The length and width of the rectangle is 4:3, the width is increased by 20cm, the length is unchanged, it becomes a square, and the area of the original rectangle is calculated ///
• 3. The area of a rectangle is 4800cm ^ 2, and its length is 20cm more than its width Find the length and width of the rectangle
• 4. A 60cm long iron wire is enclosed into a rectangle with the ratio of length to width of 3:2, and the area of the rectangle is () CM & # 178;; if A 60cm long wire is used to form a rectangle with the ratio of length to width of 3:2, and the area of the rectangle is () CM & # 178;; if it is used to make a cuboid with the ratio of length to width of 1:2:2, the surface area of the cuboid is () CM & # 178; the volume is () CM & # 179
• 5. A rectangle, 5cm long and 3cm wide, is enlarged by 3:1 to calculate the area of the figure (135)
• 6. A 5cm long and 3cm wide rectangle is enlarged by 3:1. What's the area of the figure? Attention, it's the scale! Use proportion to solve it!
• 7. A rectangle 5cm long and 6cm wide is 4:1 enlarged, and the area of the figure is () square centimeter
• 8. It needs at least () cm long wire to make a rectangular frame with a bottom area of 16 square centimeters and a height of 5cm
• 9. If the edge length of a cube is a, the sum of its edge lengths is (); if a cuboid is 4.5cm in length, width and height, the sum of its edge lengths is () cm Use two cubes whose edges are 3cm long to form a cuboid. The surface area of the cuboid is (). Hurry!
• 10. What is the square of the surface area and the cube of the volume of a cuboid 10 cm long, 6 cm wide and 5 cm high?
• 11. It is known that the length of the rectangle is √ 6cm and the width is (√ 3-1) cm. Then what is the area of the rectangle;
• 12. Given that the area of a rectangle is (4a & sup2; - 81) CM & sup2; its length is (2a + 9) cm, then what is its width?
• 13. In a right triangle, if the length of a right side is 8cm and the perimeter is 20cm, how many square centimeters is the area of the triangle?
• 14. Given that the lengths of two sides of a right triangle are √ 32cm and √ 48CM respectively, find the perimeter and area of the right triangle
• 15. Draw the largest square in a circle with a circumference of 25.12 cm. What is the square area Let's talk about the idea and the test In line with the level of primary school students
• 16. In a circle with a circumference of 25.12 cm, draw the largest square, the square area is___ Square centimeter
• 17. A cube with a centimeter long edge is cut into two identical cuboids. The surface area of the two cuboids is () cm more than that of the original cube; ①2a² ②3a² ③6a²
• 18. The surface area of a cuboid is 16000 square decimeters, and the bottom surface is a square with a side length of 40 cm. What is the volume of the cuboid
• 19. The surface of a cuboid is 162 square decimeters. Two opposite sides are 3 decimeters square. Find the volume of the cuboid
• 20. The surface area of a cuboid is 178 square decimeters, of which two opposite sides are a square with side length of 3DM. How much is the volume of this cuboid