GeoGebra
GeoGebra
Home
News Feed
Resources
Profile
People
Classroom
App Downloads
Wallace-Simson Lines of Antipodal Points
Author:
Steve Phelps
Take any point P on the circumcircle and its antipodal point. Their Simson lines intersect at right angles on the nine-point circle.
GeoGebra
New Resources
π = 4 ?
Paradoxes on π
Open Middle: Graphing Linear Inequalities (1)
Open Middle: Graphing Linear Inequalities (4)
Open Middle Cyclic Quadrilateral Exercise
Discover Resources
Caption_Spline
Shape of graph as 'a' changes
Areas of shapes
All Radii =
Incenter
Discover Topics
Interest Calculation
Arithmetic Mean
Derivative
Equations
Planes