GeoGebra
GeoGebra
  • Home
  • News Feed
  • Resources
  • Profile
  • People
  • Classroom
  • App Downloads
About GeoGebra
Contact us: office@geogebra.org
Terms of Service – Privacy – License

© 2023 GeoGebra

Level 20

Author:
Colin Beveridge
Level 20 of http://euclidthegame.org/Level20.html asks you to construct the outer tangent to two given circles (here, a, with centre A; and b, with centre B). Here's how I'd do it.

New Resources

  • Parallelogram Theorems: Quick Check-in
  • How Many Radians?
  • Kukeldash madrassa (2) - gp
  • Bibi Khanun entrance gate inside wall - ks
  • One Point of Inflection

Discover Resources

  • Section 5.2 Lesson Opener
  • GetTagSetTagXML20
  • Truchet Squares
  • Pythagoras Theorem
  • Large Format Frame Camera

Discover Topics

  • Real Numbers
  • Binomial Distribution
  • Similarity Transformation or Similarity
  • Frequency Distribution
  • Geometric Distribution

GeoGebra

  • About
  • Partners
  • GeoGebra on Tests
  • News Feed
  • App Downloads

Apps

  • Calculator Suite
  • Graphing Calculator
  • 3D Calculator
  • CAS Calculator
  • Scientific Calculator

Resources

  • Classroom Resources
  • Learn GeoGebra
  • Classroom
  • Geometry
  • Notes
  • Terms of Service Privacy License
  • Facebook Twitter YouTube