2. Find the set S1 of triangles generated in step l and such that the midpoint of one of its sides is a non-conforming node, i.e. node D and the corresponding S1=4ABC1, see Figure 23.13 3. For each triangle T E S1, join its non-conforming node with the opposite vertex, i.e. join D and C. see Figure 23.14 Figure 23. 14: Step 3, New conforming triangulation2. Find the set S1 of triangles generated in step 1 and such that the midpoint of one of its sides is a non-conforming node, i.e. node D and the corresponding S1 = {∆ABC}, see Figure 23.13. 3. For each triangle T ∈ S1, join its non-conforming node with the opposite vertex, i.e. join D and C, see Figure 23.14. D C Figure 23.14: Step 3, New conforming triangulation 9