Paper (any type will do)

Scissors (be careful when using them)

Tape or glue?

Steps:

1. Make a paper dish. Cut a circle from the paper. The height of the cone depends on the radius of the circle. The larger the radius, the higher the cone.

2. Find the center of the circle and cut a small fan along the radius of the circle.

3. Glue the remaining large sectors along two straight edges.

4. Cut a circle suitable for the bottom of the paper and stick it on the part that has been done before.

Extended data:

Definition of cone:

The space geometry consisting of a conical surface and a plane cutting it (the intersection is a circle) is called a cone.

The geometry surrounded by the surface formed by the rotation of the straight line where the right side of the right triangle is located is called a cone.

Composition of cone:

Height of cone: the shortest distance from the apex of the cone to the center of the bottom of the cone is called the height of the cone;

Cone generatrix: the radius of the sector formed by the expansion of the cone side and the distance from any point to the vertex on the circumference of the bottom surface.

Lateral area of the cone: The side of the cone spreads along the generatrix and is a sector. The arc length of this sector is equal to the circumference of the bottom of the cone, and the radius of the sector is equal to the length of the generatrix of the cone. The lateral area of the cone is arc length, and the circumference of the cone bottom × bus/2; It is a surface when it is not expanded.

A cone has a bottom surface, a side surface, a vertex, a height, and countless generatrixes. The development diagram of the bottom surface is a circle, and the development diagram of the side surface is a fan.

References:

Baidu encyclopedia-cone