How to join, and intersect objects? How do I join this two arcs in a way to connect the vertices (a vertice that connect and join these two objects). (on top and bottom).



(zoom of the picture on the top pf the object)
Given that the two edges intersect:




Select edge1 and create a new Transform Orientation from the edge's normal orientation.
Select edge2 and snap the cursor to it. &#8679; ShiftS > Cursor to Selected
Subdivide edge1 and select the created vertice. W > S
Set the Pivot center for rotation/scaling to 3D Cursor with ..
Scale the vertice to 0 along its local Y axis. SYY0





Delete edge2 (X) and connect the vertices (F).