1 .. _uniting_two_triangles_page:
7 In MESH you can union two neighboring triangles by deletion of the common edge.
9 **To unite two triangles:**
11 #. From the **Modification** menu choose the **Union of two triangles** item or click **"Union of two triangles"** button in the tool-bar.
13 .. image:: ../images/image71.png
17 **"Union of two triangles" button**
19 The following dialog box shall appear:
21 .. image:: ../images/unionoftwotriangles.png
25 #. Enter IDs of nodes forming the required edge in the **Edge** field (a couple of node IDs separated by a dash) or select this edge in the 3D viewer.
26 #. Click the **Apply** or **Apply and Close** button.
28 .. image:: ../images/uniting_two_triangles1.png
32 "The selected triangles"
35 .. image:: ../images/uniting_two_triangles2.png
39 "The union of two triangles"
41 **See Also** a sample TUI Script of a
42 :ref:`tui_uniting_two_triangles` operation.