"Circle", we can see it everywhere. Isn't the bottom of the moon cake box, tea pot and medicine box round? But they are called cylinders as a whole. Pick up these cylinders and you may think, why do you want to make the bottom round? Why not make it rectangular or square? I have questioned it before, and now I can help you solve it!
When you make a cuboid, a cube and a cylinder from the same material, you can calculate the volume. This is what we will find: the volume of a cylinder is the largest, the volume of a cube is the second, and the volume of a cuboid is the smallest. At this time, I realized that in order to save materials, I made these boxes round, which also expanded the volume.
This is the advantage of the column.
The above is math diary Grade 5 100. I hope it works for you. For more related content, please lock the primary school channel in time!