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Now we can create the edges using the vertices created. We have two type of edges: straight edge and curved edge.

Let's first start by creating straight edges by connecting following vertices:
4-12
12-13
13-9
9-8
8-7
6-5
5-4

Operation Toolpad > Geometry Command Button > Edge Command Button > Create Edge

Create the edge AB 4-12 by selecting the vertex A 1 followed by vertex B. Enter AB for Label2. Click Apply. GAMBIT will create the edge. You will see a message saying something like "Created edge: ABedge.1'' in the Transcript window.

After we create all the straight edges, start creating arc by connecting the following vertices:
4-1-9
5-2-8
5-11-8
6-3-7
6-10-7

Operation Toolpad > Geometry Command Button Image Added > Edge Command Button Image Added > Create Edge Image Added

Right click on the Create Edge to see more options. Select the Arc icon. (The default option is Straight)

Connecting arc edge.

Connecting straight edge.