2.2.3.1. GeoGebra link

1. Use the mouse to zoom in and out of the cylinder and to turn it.

2. Move point A by mouse and follow it and the circle height on the cylinder.

3. Turn the cylinder around its axis and follow points A, B, and C visibility in different positions - it is vital to indicate each point projection visibilities.

2.2.3.2. GeoGebra link

1. Use the mouse to zoom in and out of the cylinder and to turn it.

2. Use the slider to get the cylinder net.

3. Pay attention that point A projection belongs to the net of the base and side surface of the cylinder.

4. Move point A with the mouse over the side surface of the cylinder and follow the change in its position depending on the change in height - its position on the net depends on the height of the point.

2.2.3.3. GeoGebra link

1. Use the mouse to zoom in and out of the shapes and to turn them.

2. Use the sliders to get the cylinder or the polyhedron net.

3. To obtain a net, the revolving shape-cylinder can be replaced by a polyhedron. The more faces of the side surface of this polyhedron, the more accurate the size and shape of the resulting net will be.

2.2.3.4. Watch the video on how the axonometric projection of a cylinder is constructed, because the circle in axonometric becomes an oval. Only two radiuses are used to draw an oval!