What figure might the cross section of a cube be

Triangle, square, rectangle and regular hexagon

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1. What are the shapes of the section of a cube Please complete the answers separately
2. If a cube is intercepted by a plane, what kind of figure can't the shape of the cross section be? A square B triangle C trapezoid D circle why?
3. The section figure of a cube can be several sides Solid geometry of senior two
4. We often see floors with patterns as shown in the figure. They are all made of square shaped materials or hexagonal shaped materials. In this way, the materials can be paved into a flat and void free floor (1) If the floor is paved as above, can it be made of pentagonal materials? Why? (2) Can you come up with another plan to use a polygonal (not necessarily regular polygonal) material to lay the floor? Draw a sketch of your plan. (3) please draw a sketch of two different regular polygon materials
5. As shown in the figure, divide a piece of land into four groups to plant, with the same shape and size (each piece has the same number of points), how to divide it?
6. In the square with side length 6, there is a triangle bef, and the line segments AE = 3, DF = 2
7. The side length of square ABCD is 7 cm, and there is a triangle bef inside it (as shown in the figure). The line AE = 4 cm, DF = 2 cm, then the area of triangle bef is equal to______ Square centimeter
8. The side length of square ABCD is 7 cm, and there is a triangle bef inside it (as shown in the figure). The line AE = 4 cm, DF = 2 cm, then the area of triangle bef is equal to______ Square centimeter
9. The area of a rectangle is 120 square centimeters. EF is the midpoint of BC and CD respectively. How to calculate the area of the shadow?
10. As shown in the figure, it is a square with side length of 6cm. E and F are the midpoint of CD and BC respectively
11. What shape pattern might the cross section of a cube be
12. How many kinds of unfolded cube without cover are there? Please draw a more detailed picture! Thank you!
13. How many are the expanded drawings of cube? Name them and send them pictures
14. How to draw the expanded drawing of 11 sides of cube
15. Cut a cube carton along the line as shown in the figure and expand it into a plane view. The shape of the expanded view is () A. B. C. D.
16. Three dimensional drawing of cube When drawing a three-dimensional figure of a cube, what should the top and bottom surfaces be drawn? The horizontal side length is the same as the actual side length. How much is the vertical side length drawn as the actual side length?
17. A geometry is made up of small cubes of the same size. The shape of the geometry seen from above is as shown in the figure. The number in the small square represents the number of small cubes in the position. Please draw the shape of the geometry seen from the front and from the left
18. 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
19. 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?
20. As shown in the figure below, the area of a square is 2 square decimeters, and the area of a circle is calculated