This action research entitled “Detect the Hidden…Record the Unseen!: Proposed Installation of Security Cameras Applying Ear Clipping Triangulation” aimed to propose the possible locations of security cameras in Barangay 4, Lucban, Quezon town proper by applying Ear Clipping Triangulation. Specifically, the researcher sought to present the dual map of Lucban, Quezon town proper; to determine the needed security cameras to be installed in Barangay 4, and to identify the locations where security cameras are to be installed. Ear clipping triangulation was applied in the map of Lucban, Quezon town proper. Barangay 4 was partitioned according to its boundaries in order for the concerned barangay to be triangulated easily. Based on the analysis and interpretation of the gathered facts, Barangay 4, Lucban, Quezon town proper can be graphically presented forming a polygon; the process of ear clipping triangulation can be applied in determining the needed security cameras for installation. Through ear clipping triangulation, a model was proposed for the proper location of security cameras in Barangay 4, Lucban, Quezon.