Introduction to Graph Theory
This worksheet introduces fundamental concepts in graph theory, including definitions, types of graphs, and basic properties, suitable for Grade 12 mathematics students.
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Introduction to Graph Theory
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Read each question carefully and answer to the best of your ability. Show all your work for short answer questions.
1. Which of the following best describes a 'vertex' in graph theory?
A connection between two points
A point or node in the graph
The path taken between vertices
The number of edges connected to a vertex
2. A graph where all vertices have the same degree is called a:
Complete graph
Regular graph
Connected graph
Bipartite graph
3. A graph with no cycles is called a .
4. The sum of the degrees of all vertices in a graph is always equal to twice the number of .
5. In a directed graph, an edge has a .
6. A walk in a graph that visits every vertex exactly once is called a Hamiltonian path.
True
False
7. A complete graph with 'n' vertices has n(n-1)/2 edges.
True
False
8. Define what an 'Eulerian circuit' is in the context of graph theory.
9. Explain the difference between a 'path' and a 'trail' in graph theory.
10. Consider a graph G with vertices V = {A, B, C, D} and edges E = {(A,B), (A,C), (B,C), (C,D)}. Draw this graph and list the degree of each vertex.
11. For the graph drawn in question 10, determine if it is connected. Justify your answer.
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