verify Eular's formula:
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Planar Graph
When we draw dots and lines alone, it becomes a graph.
We obtain a planar graph when no lines or edges cross each other.
We can represent a cube as a planar graph by projecting the vertices and edges onto a plane.
One such projection looks like this:
planar graph
According to the Euler's formula graph theory,
Number of dots − number of lines + number of regions the plane is cut into = 2.
Step-by-step explanation:
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