diff --git a/tp/include/polygone.h b/tp/include/polygone.h
index b9cfba2..f05960c 100644
--- a/tp/include/polygone.h
+++ b/tp/include/polygone.h
@@ -20,17 +20,24 @@ public:
     virtual std::string afficherCaracteristiques() override;
     virtual int perimetre() override;
 
-private:
+protected:
     uint _hauteur, _longueur;
 };
 
-class Carre : public Polygone {
+class Carre : public Rectangle {
 public:
     Carre(uint cote);
+};
+
+class TriangleEquilateral : public Polygone
+{
+public:
+    TriangleEquilateral(uint cote);
     virtual std::string afficherCaracteristiques() override;
     virtual int perimetre() override;
 private:
     uint _cote;
+    float _angle;
 };
 
 #endif // HEADER_POLYGONE
\ No newline at end of file
diff --git a/tp/src/main.cpp b/tp/src/main.cpp
index 6b4a6ca..96501df 100644
--- a/tp/src/main.cpp
+++ b/tp/src/main.cpp
@@ -9,4 +9,6 @@ int main(void)
     std::cout << rect.afficherCaracteristiques() << std::endl;
     Carre car(2);
     std::cout << car.afficherCaracteristiques() << std::endl;
+    TriangleEquilateral tri(5);
+    std::cout << tri.afficherCaracteristiques() << std::endl;
 }
\ No newline at end of file
diff --git a/tp/src/polygone.cpp b/tp/src/polygone.cpp
index 37643ce..6e9c6c4 100644
--- a/tp/src/polygone.cpp
+++ b/tp/src/polygone.cpp
@@ -26,26 +26,31 @@ Rectangle::Rectangle(uint hauteur, uint longueur)
 
 std::string Rectangle::afficherCaracteristiques()
 {
-    return std::string("Nombre de cotes : 4\tPerimetre :"+std::to_string(perimetre()));
+    return Polygone::afficherCaracteristiques()+std::string("\tPerimetre :"+std::to_string(perimetre()));
 }
 
 int Rectangle::perimetre()
 {
-    return _longueur * _hauteur;
+    return (2*_longueur)+(2*_hauteur);
 }
 
 Carre::Carre(uint cote)
-    : Polygone(4)
+    : Rectangle(cote, cote)
+{
+}
+
+TriangleEquilateral::TriangleEquilateral(uint cote)
+    : Polygone(3)
     , _cote(cote)
+    , _angle(60.0f)
+{}
+
+std::string TriangleEquilateral::afficherCaracteristiques()
 {
+    return Polygone::afficherCaracteristiques()+std::string("\tPerimetre :"+std::to_string(perimetre())+"\t Angles :"+std::to_string(_angle));   
 }
 
-std::string Carre::afficherCaracteristiques()
+int TriangleEquilateral::perimetre()
 {
-    return std::string("Nombre de cotes : 4\tPerimetre :"+std::to_string(perimetre()));
-}
-
-int Carre::perimetre()
-{
-    return _cote * _cote;
+    return 3*_cote;
 }
\ No newline at end of file