diff --git a/12.temporary_ins/05.coordinates-systems/20.cartesian-coordinates/30.beyond/annex.en.md b/12.temporary_ins/05.coordinates-systems/20.cartesian-coordinates/30.beyond/annex.en.md
index 24e092c86..8723f8ba2 100644
--- a/12.temporary_ins/05.coordinates-systems/20.cartesian-coordinates/30.beyond/annex.en.md
+++ b/12.temporary_ins/05.coordinates-systems/20.cartesian-coordinates/30.beyond/annex.en.md
@@ -1,10 +1,10 @@
 ---
-title: Cylindrical coordinates
+title: Cartesian coordinates
 published: true
 routable: false
 visible: false
 lessons:
-    - slug: cylindrical-coordinates-linear
+    - slug: cartesian-coordinates-linear
       order: 3
 ---