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 .. |img| image:: ../images/image71.png
13 #. From the **Modification** menu choose the **Union of two triangles** item or click *"Union of two triangles"* button |img| in the tool-bar.
15 The following dialog box shall appear:
17 .. image:: ../images/unionoftwotriangles.png
21 #. 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.
22 #. Click the **Apply** or **Apply and Close** button.
24 .. image:: ../images/uniting_two_triangles1.png
28 "The selected triangles"
31 .. image:: ../images/uniting_two_triangles2.png
35 "The union of two triangles"
37 **See Also** a sample TUI Script of a
38 :ref:`tui_uniting_two_triangles` operation.