Automated Deduction in Geometry : 5th International Workshop ADG 2004 Gainesville FL USA September 16 18 2004 Revised Papers Mechanical Theorem Proving in Computational Geometry Computational Origami Construction of a Regular Heptagon with Automated Proof of Its Correctness Proving Geometric Theorems by Partitioned Parametric Gröbner Bases Computations of the Area and Radius of Cyclic Polygons Given by the Lengths of Sides Symbolic Solution of a Piano Movers’ Problem with Four Parameters Computing Curves Bounding Trigonometric Planar Maps: Symbolic and Hybrid Methods Towards Solving the Dynamic Geometry Bottleneck Via a Symbolic Approach On the Decidability of Tracing Problems in Dynamic Geometry Towards a Geometric Object Oriented Language Spatial Planning and Geometric Optimization: Combining Configuration Space and Energy Methods nD Polyhedral Scene Reconstruction from Single 2D Line Drawing by Local Propagation Planar Generalized Stewart Platforms and Their Direct Kinematics.