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Incircle, Excircle, and Nine-point Circle
Author:
Steve Phelps
Topic:
Circle
The Nine-point circle is internally tangent to the incircle and externally tangent to the three excircles.
GeoGebra
New Resources
Introduction
"Compressed" Astroid as Envelope
Ellipse, Hyperbola and Circle as Envelopes
Piano. Keyboard.
Drag that Point!
Discover Resources
Algebra 1
Rectangle_02
Unit 6 Turtle By Leanna And Connor P.2
Assessment Graph
Distance to Another Parabola
Discover Topics
Linear Equations
Confidence Interval
Volume
Secant Line or Secant
Intersection