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Drag the vertices with your mouse or finger.

order =
1-2	1-3	2-3	1-4	2-4	3-4	1-5	2-5
3-5	4-5	1-6	2-6	3-6	4-6	5-6
Show Complement
Show Complete Graph

Right-click here to download a List of Graphs of Small Orders.

Exercises for students:
Solve the following problems on paper and check your answer using the above app:
(1) Show that the graph 1 - 2 - 3 - 4 (Path P₄) is self-complementary.
(2) Show that the graph with edges 1-2, 2-3, 3-4, 2-5, 3-5 (nicknamed 'bull') is self-complementary.
(3) Show that the graph 1 - 2 - 3 - 4 - 5 - 1 (Cycle C₅) is self-complementary.
(4) Find the complement of the graph with edges 1-2, 2-3, 3-4, 3-5 (nicknamed 'fork' or 'chair').