DescriptionOrthosystem SVG.svg	English: This is an SVG version of the image Orthosystem.png by user User:Magister Mathematicae.
Date	6 April 2015
Source	Own work
Author	Limaner

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Eukleides code:

box(-2, -2, 8, 6,3)
A B C triangle
H=orthocenter(A,B,C)
draw(H,dot,4)
mark(C,intersection(line(A,B),line(H,C)),B,right)
x=point(line(B,H),6)
mark(x,intersection(line(A,C),line(H,B)),A,right)
y=point(line(A,H),6)
mark(y,intersection(line(B,C),line(H,A)),B,right)
draw(C,dot,4)
draw(B,dot,4)
draw(A,dot,4)
thickness(3)
draw(A,C,H)
draw(line(A,B),dotted)
draw(line(A,C),dotted)
draw(line(B,C),dotted)
draw(line(H,A),dotted)
draw(line(H,B),dotted)
draw(line(H,C),dotted)