Update textbook.en.md

5 years ago · e136b80a9c
1 changed files with 1 additions and 1 deletions
--- a/12.temporary_ins/05.coordinates-systems/20.cartesian-coordinates/10.main/textbook.en.md
+++ b/12.temporary_ins/05.coordinates-systems/20.cartesian-coordinates/10.main/textbook.en.md
@ -1,6 +1,6 @@
 ---
 title: Cartesian coordinates
-published: true
+published: false
 routable: false
 visible: false
 lessons: