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
RELATED INFORMATIONS
- 1. As shown in the figure below, the area of a square is 2 square decimeters, and the area of a circle is calculated
- 2. As shown in the figure below, the area of a square is 2 square decimeters, and the area of a circle is calculated
- 3. 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?
- 4. 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
- 5. 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
- 6. 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?
- 7. 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.
- 8. How to draw the expanded drawing of 11 sides of cube
- 9. How many are the expanded drawings of cube? Name them and send them pictures
- 10. How many kinds of unfolded cube without cover are there? Please draw a more detailed picture! Thank you!
- 11. Draw the largest circle in a square. What is the ratio of the area of the circle to that of the square
- 12. In the figure below, there is the largest circle in the square. The known area of the circle is 60 square meters. What is the area of the square? 10fenzong
- 13. There is a biggest circle in the square. The area of the circle is 60 cm. What is the area of the square
- 14. After an angle is intercepted by a polymorph, the sum of the inner angles of the polymorph is 1260 degrees. How many sides is the original polygon,
- 15. If the sum of the inner angles of a polygon is 1620 ° after cutting off an angle, the original polygon is a polygon
- 16. If a convex polygon truncates an inner angle and the sum of the inner angles of another polygon is 1620 degrees, then the number of sides of the original polygon is?
- 17. It is known that the sum of the inner angles of another polygon is 1620 ° after a polygon cuts off an angle
- 18. After a polygon is connected with an angle (the section line can not reach the vertex), the inner angle of the formed polygon is 2520 degrees, so the original polygon has more sides
- 19. After a polygon cuts off an angle, the sum of the inner angles of the new polygon is 2520 degrees
- 20. Make a straight line through a vertex of a polygon, cut off two corners of the polygon, and the sum of its inner angles becomes 1260 degrees, then the original number of sides of the polygon is 1260 degrees______ .