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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. #### Solids of revolution

Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution. #### Geometric transformations – reflection

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

Chess games can help to develop logic skills. #### Three-dimensional Cartesian coordinate system

3-dimensional Cartesian coordinate system with illustrations and exercises that develop spatial perception. #### Geometric transformations – rotation

This animation demonstrates geometric rotation, a type of geometric transformation both in plane and space. #### Geometric transformations – translation

This animation demonstrates geometric translation in both plane and space. #### Optical illusion

The information gathered by the eye is misinterpreted by the brain. #### Kepler´s laws of planetary motion

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

This exciting and colourful game is designed to develop spatial perception. You can check your solutions using isometric views. #### What is the time?

A game to practise the use of analogue and digital clocks. #### Ames room

An Ames room is a distorted room that is used to create an optical illusion. #### Non-orientable surfaces

The Möbius strip and the Klein bottle are special two-dimensional surfaces with only one side. #### The reflection and refraction of light

A ray of light is reflected or refracted at the boundary of two mediums with different refractive indices. #### Dividing Space into Regions by 3 Planes

Division of space by three intersecting planes in several different arrangements. #### Volume of a tetrahedron

To calculate the volume of a tetrahedron we start by calculating the volume of a prism. #### 3D Tangram

A special, 3D version of the well-known Chinese logical game. #### Dice

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