### Related items

#### Geometric transformations – reflection

This animation demonstrates geometric reflection, a type of geometric transformation both in plane and space.

#### Geometric transformations – translation

This animation demonstrates geometric translation in both plane and space.

#### Solids of revolution

Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution.

#### Solids of revolution (rectangle)

Rotating a rectangle around its axes of symmetry or around its sides results in solids of revolution.

#### Angle of inclination of lines and planes

This animation demonstrates the angle of inclination of lines and planes in various positions.

#### Relative position of lines and planes

This animation demonstrates the relative position of lines and planes.

#### Sphere

A sphere is the set of points which are all within the same distance from a given point in space.

#### Surface area of spheres (demonstration)

The surface of a sphere consists of the set of points which are all at the same distance from a given point in space.

#### Three-dimensional Cartesian coordinate system

3-dimensional Cartesian coordinate system with illustrations and exercises that develop spatial perception.

#### Volume of spheres (Cavalieri´s principle)

Calculating the volume of a sphere is possible using an appropriate cylinder and cone.