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How many faces does a planar drawing of gr have

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Question: 1. The graph GL at left in Figure is planar. How many faces does a planar drawing of GL have?

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2. The graph GR at right in Figure is planar. How many faces does a planar drawing of GR have?

3. Suppose a connected planar graph P has every vertex of degree at least 3, and every face of size at least 3. Can P have fewer than six edges?

4. Suppose a connected planar graph P has every vertex of degree at least 3 and every face of size at least 3. Can P have exactly seven edges?

Reference no: EM131585750

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