Google Classroom
GeoGebra
GeoGebra Classroom
Sign in
Search
Google Classroom
GeoGebra
GeoGebra Classroom
GeoGebra
Home
Resources
Profile
Classroom
App Downloads
Point projection via matrices
Author:
Jonathan Holland
Topic:
Matrices
The 3x3 matrix Proj = eye(3) - [P_1;P_2;1][u_1 u_2 0]/dot(u,P) gives the point projection from projection point P=(P_1,P_2) onto the line through the origin with normal u=[u_1;u_2], in homogeneous coordinates.
GeoGebra
New Resources
Roman Numerals Bingo
Droste effect
alg2_05_05_01_applet_exp_2_flvs
Droste effect draft
What is an Isogonal Conjugate?
Discover Resources
Pythagorean Theorem Demonstration
Unit 11 Test
pappus chain one level
kugel
Bearings Exercise
Discover Topics
Linear Functions
Kite
Arithmetic
Congruence
Percentages