# Answer to Question #15149 in Discrete Mathematics for subha

Question #15149

prove that every subgraph of a planar graph is planar

Expert's answer

Let's consider some planar graph. All its subgraphs are obtained by throwing out some of its vertex and links. Throwing out vertex and links doesn't break the planarity of the graph. So, every subgraph of a planar graph is planar.

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