Matching meshes

Hia all,
I need a bit of help about matching meshes, I have a mesh (actually 3) that have a division and I would like to create a mesh from a surface that share its edges with the first one.
I need that the division of the almost triangular mesh coincides with that one on the first mesh.
Anyone can help me?
Thanks in advance!

question.gh (19.7 KB)