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OK /sci/ lets do a visualization exercise:
>1. Visualize a cube. See all of its edges.
How many edges does it have in total? (count them visually)
>2. Imagine the cube hangs from a wire connected to one of its vertexes.
a) How many edges are connected to the top vertex?
b) How many edges are connected to the bottom vertex?
c) How many edges are connected to neither the top or bottom vertex? (count them visually)
>3. The cube is solid.
How many faces does it have? (count them visually)
>4. The solid cube still hangs from the wire. A 2D horizontal plane intersects the cube through its center, dividing it into 2 identical halves. The bottom half falls away.
How many faces does the remaining shape have? (count them visually)
If you cheat to find the answer, or have to calculate it rather than visually counting, then you have failed the test.
>1. Visualize a cube. See all of its edges.
How many edges does it have in total? (count them visually)
>2. Imagine the cube hangs from a wire connected to one of its vertexes.
a) How many edges are connected to the top vertex?
b) How many edges are connected to the bottom vertex?
c) How many edges are connected to neither the top or bottom vertex? (count them visually)
>3. The cube is solid.
How many faces does it have? (count them visually)
>4. The solid cube still hangs from the wire. A 2D horizontal plane intersects the cube through its center, dividing it into 2 identical halves. The bottom half falls away.
How many faces does the remaining shape have? (count them visually)
If you cheat to find the answer, or have to calculate it rather than visually counting, then you have failed the test.
