Sivukartta Sulje Part II : Classifying figures and areas 1. The coordinate system Pictures 2. Basic concepts of geometry Pictures 3. Angles Background: Reflection Pictures 4. Adjacent angles and opposite angles Pictures 5. Corresponding angles Pictures 6. Circles Pictures 7. Drawing with a compass Pictures 8. Polygons Pictures 9. Triangles Pictures 10. Regular polygons Pictures 15. Revision Pictures