Welcome to Geometer's Sandbox.

The site is under development. Only some examples are available at the moment.

List of samples:

• Problem 4578
• Problem 4594
• Problem 5339
  • Inverse, variant 1
  • Inverse, variant 2
• Onestep Problem One
• Onestep Problem Two
• Altitudes in acute-angled triangle
• Altitudes in obtuse-angled triangle
• Problem 4.1.1 from Akopyan's book
  • Inversed
• Problem 5.3.1 from Akopyan's book
• Problem 5.3.3 from Akopyan's book
• Napoleon's theorem
  • Variant: inward equilateral triangles
• Langley’s Adventitious Angles