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 11. Lengths and perimeters Background: The SI system and ISO Pictures 12. Units of area Pictures 13. Areas of triangles, parallelograms and trapeziums Pictures 14. Spreadsheets 15. Revision Pictures