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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.

Scale exercises

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

3D puzzle

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

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.

Dice

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

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