Update textbook.en.md

5 years ago · 4d8cc76f34
1 changed files with 1 additions and 1 deletions
--- a/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/10.main/textbook.en.md
+++ b/12.temporary_ins/05.coordinates-systems/30.cylindrical-coordinates/10.main/textbook.en.md
@ -1,7 +1,7 @@
 ---
 title: Cylindrical coordinates
 published: true
-routable: false
+routable: true
 visible: false
 lessons:
    - slug: