Total: 71 #### Perimeter, area, surface area and volume

This animation presents the formulas to calculate the perimeter and area of shapes as well as the surface area and volume of solids. #### Optical illusion

The information gathered by the eye is misinterpreted by the brain. #### Geometric transformations – rotation

This animation demonstrates geometric rotation, a type of geometric transformation both in plane and space. #### Chess games

Chess games can help to develop logic skills. #### 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. #### Kepler´s laws of planetary motion

The three important laws describing planetary motion were formulated by Johannes Kepler. #### 3D puzzle

This exciting and colorful game is designed to develop spatial perception. You can check your solutions using isometric views. #### Three-dimensional Cartesian coordinate system

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

An interesting logical exercise: you have many weights that look the same, you have to find the only one that is different. #### Notable products

A spectacular demonstration of algebraic expressions. #### Solids of revolution

Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution. #### What is the time?

A game to practice the use of analog and digital clocks. #### Conic sections

The conic section is a plane curve that is created when a right circular cone is intersected by a plane. #### Non-orientable surfaces

The Möbius strip and the Klein bottle are special two-dimensional surfaces with only one side. #### The first days in school

Learn the concept of colors, numbers, letters and shapes while playing #### Volume of a tetrahedron

To calculate the volume of a tetrahedron we start by calculating the volume of a prism. #### Dice

Regular dice can be used for solving statistical and probability exercises. #### Platonic solids

This animation demonstrates the five regular three-dimensional (or Platonic) solids, the best known of which is the cube. #### Cube (exercises)

Edges, diagonals and faces of a cube can be identified by its vertices.