Google Classroom
GeoGebra
GeoGebra Classroom
Sign in
Search
Google Classroom
GeoGebra
GeoGebra Classroom
GeoGebra
Home
Resources
Profile
Classroom
App Downloads
Coxeter- Theorem 2.23
Author:
AndrewLyon
Topic:
Geometry
2.23 -
If two lines have a common point, they are coplanar.
PROOF. If two lines have a common point
C
, we may name them
AC
,
BC
, and conclude that they lie in the plane
ABC
.
GeoGebra
New Resources
Dissections by Guillermo Bautista
Shadow of a Cube (v2)
Addition of Vectors
Tutorial: Create lists of numbers and objects
Rotating rings: Community Showcase
Discover Resources
Slope Fields and General Solutions
Circle Area Problem
Quadrilaterals Exterior 360
Water Pressure in a Tank
KUBUS
Discover Topics
Expected Value
Differential Calculus
Cosine
Multiplication
Centroid or Barycenter