2. From the 2D to the 3D


    II. From Flatland to the 3D

    You feel so good being a flatlander…

    Sometimes strange things happen : Some shapes are passing through Flatland and a few seconds later they vanish… What can it be ?

    Actually, It rains 3D solids in FlatLand … and the drops looks like regular polyhedrons.
    The flatlanders only see the drops when they cross their land.

    For instance, let's have a look at how a Flatlander sees a spherical drop (which is not a polyhedron) :

    1. Make a list of the 5 possible regular polyhedrons.

    2. Draw a chronological table to show how a drop intersects flatland (for the 3 first polyhedrons)