Google Classroom
GeoGebra
GeoGebra Classroom
Sign in
Search
Google Classroom
GeoGebra
GeoGebra Classroom
GeoGebra
Home
Resources
Profile
Classroom
App Downloads
Desargues's theorem in 3D
Author:
Steve Phelps
Desargues's theorem states two triangle are in perspective axially if and only if they are in perspective centrally. A proof is easy to see in 3D.
GeoGebra
New Resources
Ellipse as Envelope - Correspondence Method
"Compressed" Astroid as Envelope
History of Maths
Witch of Agnesi - A Classical Construction
cylinder net slider
Discover Resources
test1
page 145 #6 grade 8 math
Carbon
Task 3pos 3
GoGeometry Action 18!
Discover Topics
Tangent Function
Quadratic Equations
Piecewise Functions
Secant Line or Secant
Means