diff --git a/12.temporary_ins/06.geometry-coordinates/40.n4/10.main/textbook.fr.md b/12.temporary_ins/06.geometry-coordinates/40.n4/10.main/textbook.fr.md
index 882d35beb..4f9c81916 100644
--- a/12.temporary_ins/06.geometry-coordinates/40.n4/10.main/textbook.fr.md
+++ b/12.temporary_ins/06.geometry-coordinates/40.n4/10.main/textbook.fr.md
@@ -141,6 +141,7 @@ $`\quad\begin{matrix}
 x_1(x'_1, x'_2, ... , x'_n) \\
 x_2(x'_1, x'_2, ... , x'_n) \\
 \vdots \\
+\quad \\
 x_n(x'_1, x'_2, ... , x'_n) 
 \end{matrix}`$