diff --git a/4e/15_Pythagore_reciproque/exercises.tex b/4e/15_Pythagore_reciproque/exercises.tex
index aba7ebb..e6eab3c 100644
--- a/4e/15_Pythagore_reciproque/exercises.tex
+++ b/4e/15_Pythagore_reciproque/exercises.tex
@@ -69,7 +69,7 @@
         \begin{enumerate}
             \item 
                 \begin{tikzpicture}[rotate=0, scale=0.6]
-                    \draw[fill=blue!50] 
+                    \draw[fill=blue!20] 
                     (-2,0) -- node[midway, left]{3cm}
                     (-2,-3) -- node[midway, below]{4cm} 
                     (3,-3) -- 
@@ -77,20 +77,20 @@
                     \draw (-2, -3) rectangle (-1.8, -2.8);
                 \end{tikzpicture}
             \item 
-                \begin{tikzpicture}[rotate=30, scale=0.6]
-                    \draw[fill=blue!50] 
-                    (-2,0) -- node[midway, left]{8cm}
-                    (-2,-3) -- node[midway, right below]{15cm} 
+                \begin{tikzpicture}[rotate=30, scale=0.6, transform shape]
+                    \draw[fill=blue!20] 
+                    (-2,0) -- node[sloped, midway, below]{\LARGE 8cm}
+                    (-2,-3) -- node[sloped, midway, below]{\LARGE 15cm} 
                     (3,-3) -- 
                     cycle;
                     \draw (-2, -3) rectangle (-1.8, -2.8);
                 \end{tikzpicture}
             \item 
-                \begin{tikzpicture}[rotate=170, scale=0.6]
-                    \draw[fill=blue!50] 
-                    (-2,0) -- node[midway, right]{28cm}
+                \begin{tikzpicture}[rotate=170, scale=0.6, transform shape]
+                    \draw[fill=blue!20] 
+                    (-2,0) -- node[sloped, midway, below]{\LARGE 28cm}
                     (-2,-3) -- 
-                    (3,-3) -- node[midway, left]{53cm} 
+                    (3,-3) -- node[sloped, midway, above]{\LARGE 53cm} 
                     cycle;
                     \draw (-2, -3) rectangle (-1.8, -2.8);
                 \end{tikzpicture}
@@ -107,16 +107,193 @@
 % ----
 
 \begin{exercise}[subtitle={Calcul du 3e côté}, step={3}, origin={MEpC}, topics={ Pythagore reciproque }, tags={ Pythagore, géométrie }]
-    \begin{tikzpicture}[rotate=0, scale=0.4]
-        \draw[fill=blue!20] 
-        (0,0) -- node[sloped, midway, left]{3cm}
-        (-6,0) -- node[midway, below]{4cm} 
-        (-6,4) -- 
-        cycle;
-        \draw (-6, 0) rectangle ++(0.2, 0.2);
-        \draw (0, 0) rectangle ++(-6, -6);
-        \draw (-6, 0) rectangle ++(-4, 4);
-        \draw (0, 0) -- (4, 6) -- (-2, 10) -- (-6, 4) -- cycle;
-    \end{tikzpicture}
+    Pour chacun des triangles déterminer la longueur du côté manquant
+
+    \begin{multicols}{3}
+        \begin{enumerate}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=0, scale=0.7]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, sloped, below]{3cm}
+                    (-3,0) -- node[midway, sloped, above]{2cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                    \draw (0, 0) rectangle ++(-3, -3);
+                    \draw (-3, 0) rectangle ++(-2, 2);
+                    \draw (0, 0) -- (2, 3) -- (-1, 5) -- (-3, 2) -- cycle;
+                \end{tikzpicture}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=30, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, below, sloped]{\large 36cm}
+                    (-3,0) -- node[midway, above, sloped]{\large 77cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                    \draw (0, 0) rectangle ++(-3, -3);
+                    \draw (-3, 0) rectangle ++(-2, 2);
+                    \draw (0, 0) -- (2, 3) -- (-1, 5) -- (-3, 2) -- cycle;
+                \end{tikzpicture}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=180, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, above, sloped, rotate=180]{\large 48m}
+                    (-3,0) -- node[midway, above, sloped]{\large 55m} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                    \draw (0, 0) rectangle ++(-3, -3);
+                    \draw (-3, 0) rectangle ++(-2, 2);
+                    \draw (0, 0) -- (2, 3) -- (-1, 5) -- (-3, 2) -- cycle;
+                \end{tikzpicture}
+        \end{enumerate}
+    \end{multicols}
+
+    \begin{multicols}{4}
+        \begin{enumerate}
+            \setcounter{enumi}{3}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=50, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, sloped, below]{\large 7cm}
+                    (-3,0) -- node[midway, sloped, above]{\large 24cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=40, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, below, sloped]{\large 1,6cm}
+                    (-3,0) -- node[midway, above, sloped]{\large 63cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=100, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, above, sloped, rotate=180]{\large 6.5m}
+                    (-3,0) -- node[midway, above, sloped]{\large 72m} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=0, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, above, sloped, rotate=180]{\large 2m}
+                    (-3,0) -- node[midway, above, sloped]{\large 1m} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+        \end{enumerate}
+    \end{multicols}
+
+    \begin{multicols}{2}
+        \begin{enumerate}
+            \setcounter{enumi}{7}
+            \item Triangle $ABC$ rectangle en $A$ tel que \\ $AB = 60mm$ et $AC=91mm$
+            \item Triangle $IJK$ rectangle en $K$ tel que \\ $AB = 13m$ et $AC=84m$
+            \item Triangle $LMN$ rectangle en $L$ tel que \\ $AB = 3cm$ et $AC=7m$
+            \item Triangle $EFG$ rectangle en $E$ tel que \\ $AB = 6m$ et $AC=12m$
+        \end{enumerate}
+    \end{multicols}
+
+\end{exercise}
+
+\begin{exercise}[subtitle={Calcul d'un petit côté}, step={3}, origin={MEpC}, topics={ Pythagore reciproque }, tags={ Pythagore, géométrie }]
+    Pour chacun des triangles déterminer la longueur du côté manquant
+
+    \begin{multicols}{3}
+        \begin{enumerate}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=0, scale=0.7]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, sloped, below]{3cm}
+                    (-3,0) -- node[midway, sloped, above]{2cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                    \draw (0, 0) rectangle ++(-3, -3);
+                    \draw (-3, 0) rectangle ++(-2, 2);
+                    \draw (0, 0) -- (2, 3) -- (-1, 5) -- (-3, 2) -- cycle;
+                \end{tikzpicture}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=30, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, below, sloped]{\large 36cm}
+                    (-3,0) -- node[midway, above, sloped]{\large 77cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                    \draw (0, 0) rectangle ++(-3, -3);
+                    \draw (-3, 0) rectangle ++(-2, 2);
+                    \draw (0, 0) -- (2, 3) -- (-1, 5) -- (-3, 2) -- cycle;
+                \end{tikzpicture}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=180, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, above, sloped, rotate=180]{\large 48m}
+                    (-3,0) -- node[midway, above, sloped]{\large 55m} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                    \draw (0, 0) rectangle ++(-3, -3);
+                    \draw (-3, 0) rectangle ++(-2, 2);
+                    \draw (0, 0) -- (2, 3) -- (-1, 5) -- (-3, 2) -- cycle;
+                \end{tikzpicture}
+        \end{enumerate}
+    \end{multicols}
+
+    \begin{multicols}{4}
+        \begin{enumerate}
+            \setcounter{enumi}{3}
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=50, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, sloped, below]{\large 7cm}
+                    (-3,0) -- node[midway, sloped, above]{\large 24cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=40, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, below, sloped]{\large 1,6cm}
+                    (-3,0) -- node[midway, above, sloped]{\large 63cm} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=100, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, above, sloped, rotate=180]{\large 6.5m}
+                    (-3,0) -- node[midway, above, sloped]{\large 72m} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+
+            \item 
+                \begin{tikzpicture}[baseline=(a.north west), rotate=0, scale=0.7, transform shape]
+                    \draw[fill=blue!20] 
+                    (0,0) -- node[ midway, above, sloped, rotate=180]{\large 2m}
+                    (-3,0) -- node[midway, above, sloped]{\large 1m} 
+                    (-3,2) -- 
+                    cycle;
+                    \draw (-3, 0) rectangle ++(0.2, 0.2);
+                \end{tikzpicture}
+        \end{enumerate}
+    \end{multicols}
 \end{exercise}
 
diff --git a/4e/15_Pythagore_reciproque/plan_de_travail.pdf b/4e/15_Pythagore_reciproque/plan_de_travail.pdf
index 609d862..402d7df 100644
Binary files a/4e/15_Pythagore_reciproque/plan_de_travail.pdf and b/4e/15_Pythagore_reciproque/plan_de_travail.pdf differ