GeoGebra
GeoGebra
Home
News Feed
Resources
Profile
People
Classroom
App Downloads
Incircle, Excircles, and the 9-Point Circle
Author:
Steve Phelps
Topic:
Circle
,
Circumcircle or Circumscribed Circle
,
Incircle or Inscribed Circle
,
Triangles
There are four circles tangent to three sides of a triangle...
GeoGebra
And one circle tangent to all four circles.
GeoGebra
New Resources
Volumes of Prisms, Cylinders
Pendulum waves with 15 balls
Missing Square? Extra Square?
Probability and Geometry
ggbBeebies - ggbBimbi
Discover Resources
Consecutive triangle numbers
Island Hut Problem
Angle in Radians 10
Sum of Exterior Angles of Polygons
Equal chords are equidistant
Discover Topics
Straight Lines
Limits
Geometric Distribution
Cube
Scatter Plot