plane geometry

this page brings together selected plane geometry topics, collected in webpages on theorems, plane curves, and polygons, each shown with still images that point to the corresponding dynamic constructions built with GeoGebra:

• plane polygons:
  • triangles
  • quadrangles
  • regular pentagon
  • regular hexagon
  • regular octagon
  • regular decagon
• plane curves:
  • curves
  • conics
• theorems:
  • Napoleon theorem
• GeoGebra books