**COURSE OF SOLID GEOMETRY – ENGLISH – INTRODUCTION**

Presentation of the Contents of Each of the Chapters of the Course of Solid Geometry

Basic Elements of Plane Geometry

Points, Lines and Planes

Definitions of Points

Definitions of Lines

Definitions of Planes

Postulates of Euclides

Postulates of Lines and Planes

Determining a Plane

Conclusions on Determining a Plan

Lines and Planes

Intersection of Lines and Planes

Intersections of Planes

Lines and Planes Parallel

Parallelism between Line and Plane

Parallel Plans

Angles between Lines

Perpendicular Lines and Planes

Lines Perpendicular to a Plane

Postulates of Lines and Planes

Determining a Plane

Conclusions on Determining a Plan

Dihedral Angle

Definitions about Dihedral Angle

Theorems about Dihedral Angle

Consequences of Theorems

Trihedral and Polyhedral Solid Angles

Definitions about Solid Angles

Trihedrons and Polyhedrons

Definitions about Trihedrons and Polyhedrons

Properties about Trihedrons and Polyhedrons

Theorems about Trihedrons and Polyhedrons

Corollaries Resulting from Theorems

Equalities of Trihedrons

Cases of Equalities of Trihedrons

Supplementary Trihedrons Construction,

Solid Angles Properties

Review of the Plane Geometry – Polygons

Concave Polygons and Convex Polygons

Regular and Non-Regular Polygons

Important Structures of the Polygons

Plane Geometry – Polygons

Relations between Elements of the Lateral Triangle

Table of Values for Central Angles of the Polygons

Sum of the External Angles of the Polygons

Sum of the Internal Angles of the Polygons

Number of Diagonals

Values of the angles in a regular polygon

Polygons

Regular Hexagon

Regular Triangle

Regular Dodecahedron

Square

Regular Octagon

Regular Decagon

Regular Pentagon

Regular Heptagon

Regular Nonagon

Regular Hendecagon

Final Considerations on Polygons