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The edge length of the large cube is twice that of the small cube, and the volume of the large cube is 21 cubic decimeters more than that of the small cube. What is the volume of the small cube?
21 (8-1) = 3 (cubic decimeter), a: the volume of small cube is 3 cubic decimeter
The edge length of the large cube is twice that of the small cube, and the volume of the large cube is 21 cubic decimeters more than that of the small cube. What is the volume of the small cube?
21 (8-1) = 3 (cubic decimeter), a: the volume of small cube is 3 cubic decimeter
The edge length of the large cube is twice that of the small cube, and the volume of the large cube is 21 cubic decimeters more than that of the small cube. What is the volume of the small cube?
21 (8-1) = 3 (cubic decimeter), a: the volume of small cube is 3 cubic decimeter
The edge length of the large cube is twice that of the small cube, and the volume of the large cube is 21 cubic decimeters more than that of the small cube. What is the volume of the small cube?
21 (8-1) = 3 (cubic decimeter), a: the volume of small cube is 3 cubic decimeter
As shown in the figure, a is the center of the circle, the area of the square is 10 square decimeters, then the area of the circle is______ ．
14 × 10 = 31.4 (square decimeter). Answer: the area of a circle is 31.4 square decimeter
As shown in the figure below, the area of a square is 2 square decimeters, and the area of a circle is calculated
π R2 = 3.14 × 2 = 6.28 (square decimeter); a: the area of a circle is 6.28 square decimeter
As shown in the figure, a is the center of the circle, the area of the square is 10 square decimeters, then the area of the circle is______ ．
14 × 10 = 31.4 (square decimeter). Answer: the area of a circle is 31.4 square decimeter
Use several small cubes of the same size to build a geometry. The shape of the geometry seen from the front and above is as shown in the figure. According to the geometry you built, draw its shape from the left. Can you build other geometry that meets the conditions?
As shown in the figure, we can also build other geometry that meet the conditions
Use several small cubes of the same size to build a geometry. The shape of the geometry seen from the front and above is as shown in the figure. According to the geometry you built, draw its shape from the left. Can you build other geometry that meets the conditions?
As shown in the figure, we can also build other geometry that meet the conditions
Build a geometry with a small cube so that it can be seen from the front and from the top as shown in the figure. Is there only one geometry like this? How many cubes does it need at most? How many cubes does it need at least? Please draw the figure from the left in both cases
There is not only one kind of geometry, it needs at most 2 × 5 = 10 small cubes, it needs at least 2 × 3 + 2 = 8 small cubes. When the small cubes are most, the left view has 2 columns, which are 2 or 2 squares from left to right; when the small cubes are least, there are 2 cases: ① there are 2 columns, which are 1 or 2 squares from left to right; ② there are 2 columns, which are 2 or 2 squares from left to right Square; as shown in the figure:
RELATED INFORMATIONS
- 1. The edge length of the large cube is twice that of the small cube, and the volume of the large cube is 21 cubic decimeters more than that of the small cube. What is the volume of the small cube?
- 2. The sum of the circumference of the fourth grade math problem is 16 cm to find the area of the big square
- 3. Divide a rectangle 10 cm long and 6 cm wide into four different rectangles and find the sum of the circumference of the four different rectangles
- 4. Convert a circle into an approximate rectangle. If the circumference of the rectangle is 6 cm larger than that of the circle, how many square centimeters is the area of the circle Figure, draw circle 32 equal parts, expand into an approximate rectangle
- 5. The circumference of a rectangular vegetable field is 320.4 meters, and the length is twice the width. How many meters are the length and width? You have to list the formulas
- 6. A rectangular vegetable field is twice as long as it is wide, and its perimeter is 54 meters. What is the length and width of this vegetable field Please, please!
- 7. The circumference of a rectangular vegetable field is 120 meters. It is known that its width is 2 / 3 of its length,
- 8. If the length and width of a rectangle are increased by a quarter and a third respectively, how much will its area be increased?
- 9. Draw a rectangle at will, and then increase the length and width of the rectangle by 1 / 2 respectively? What do you find?
- 10. Use three square with 13 cm circumference to form a rectangle, and find the circumference of the rectangle
- 11. A 3 * 3 * 3 large square is composed of 27 small cubes. How many small squares can you cut with a knife?
- 12. Given that the edge length of a cube is 8 cm, make another cube so that its volume is three times the volume of the original cube, and calculate the surface area of the cube (accurate to 0.1 square centimeter)
- 13. The surface area of the large cube is______ Square centimeter
- 14. How many square centimetres has the surface area of three small cubes reduced compared with the total surface area of the original three cubes?
- 15. How many square centimeters has the total surface area of this rectangle been reduced
- 16. The length of the two sides is 8 cm and the width is 4 cm. What is the circumference of the rectangle? If you put them together into a square, find the circumference of the square
- 17. The sum of the edge lengths of a rectangle made up of three squares of the same size is 60cm, and the surface area () and volume () of a small square
- 18. What kind of figure can be made from two rectangles with a length of 8 cm and a width of 4 cm? What are the area and perimeter of the figure?
- 19. Xiaoming's dining table is round. Mother needs a square tablecloth with a diameter of 1.5 meters and 2 meters. To make the four corners of the square tablecloth just touch the ground, how many meters should the diagonal of the square tablecloth be?
- 20. There is a rectangle, 6.5cm long and 2cm wide. Cut it into six pieces and then put it together into a square. How do you spell it? You need graphics,