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

The Orthopole and the Nine-Point Circle

Author:
Steve Phelps
Topic:
Circle

I did NOT expect this!

Construct a tangent to a point on the nine-point circle. Construct the orthopole of the triangle with respect to this tangent. As the point on the nine-point circle moves along the circle, the locus of the orthopole is THIS!

New Resources

  • Open Middle: Graphing Linear Inequalities (2)
  • Which Area is Larger?
  • Simple Bridge (GeoGebra 3D Workshop)
  • Mapping Rectangles into Discs
  • Open Middle: Graphing Linear Inequalities (3)

Discover Resources

  • Adding Fractions with Unlike Denominators
  • Qualitative Graph Cousino 3
  • กราฟสมการเชิงเส้น
  • A Perfect Square
  • Part-Part-Whole Ratios: IM 6.2.15

Discover Topics

  • Prism
  • Definite Integral
  • Variance
  • Trapezoid
  • Set Theory

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