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Zhuanzhui creativity manual

Creative work with cylindrical cones is as follows:

Step 1: Cut out five discs, one big, four small, with blue cardboard, and cut all the discs into big sectors.

Step 3: Roll the five disks into a cone.

Step 4: Roll out five cylinders with white cardboard, one big and four small.

Step 5: Paste the big cylinder and the big cone together, and then assemble the small cylinder and the cone respectively.

Step 6: paste the assembled small cone and cylinder on the large cone cylinder respectively, and the general shape of the rocket is completed.

Introduction of cylindrical cone;

1. A cylinder is a geometric body surrounded by two equal and parallel circles (bottom surfaces) and a curved surface (side surfaces) connecting the two bottom surfaces.

When the axis of a cylinder is perpendicular to the bottom of the cylinder, it is called a right cylinder. When the axis of a cylinder is not perpendicular to the bottom of the cylinder, it is called an oblique cylinder.

2. A cone is a geometric figure, which has two definitions. Analytic geometry definition: A spatial geometry consisting of a conical surface and a plane intersecting it (the intersection line is a circle) is called a cone.

Definition of solid geometry: The geometry formed by taking the straight line where the right side of a right triangle is located as the rotation axis and the other two sides rotating 360 degrees is called a cone.

The axis of rotation is called the axis of a cone. The surface formed by rotating a surface perpendicular to the axis is called the bottom surface of the cone. A surface that is rotated by an edge that is not perpendicular to the axis is called the side of a cone. No matter where you rotate, the side that is not perpendicular to the axis is called the generatrix of the cone.