Science and Education Publishing International Journal of Partial Differential Equations and Applications ISSN Pending 2 1 2014 02 10 The Wave Equation with Dynamic Wentzell Boundary Condition in Polygonal and Polyhedral Domains: Observation and Exact Controllability 13 22 EN Tawfik Masrour Research Laboratory (M2.I), Mathematical Modeling for Analysis and Decision Making Research team (M2APD), Moulay Ismail University ENSAM, Meknes, Morocco IJPDEA2014213 10.12691/ijpdea-2-1-3 2013 11 30 2014 01 28 2014 02 10 We study in this article the boundary observability and the exact controllability for a problem of transmission. The system is governed by the wave equation with Wentzell dynamic artificial condition on the boundary. The geometrical domains considered are polyhedrons or polygons.