diff --git a/src/funktion.c b/src/funktion.c
index 57bfdf9..85978a8 100644
--- a/src/funktion.c
+++ b/src/funktion.c
@@ -333,4 +333,7 @@ double dreieckUmfangn(double a, double b, double c) {
 }
 double viereckFlaeche(double a, double b) {
     return a * b;
+}
+double viereckUmfang(double a, double b){
+    return (2 * a) + (2 * b);
 }
\ No newline at end of file
diff --git a/src/funktion.h b/src/funktion.h
index a462b49..36467ba 100644
--- a/src/funktion.h
+++ b/src/funktion.h
@@ -58,5 +58,6 @@ double kreisUmfang(double r);
 double dreieckFlaeche(double a, double b, double c);
 double dreieckUmfangn(double a, double b, double c);
 double viereckFlaeche(double a, double b);
+double viereckUmfang(double a, double b);
 
 #endif
diff --git a/src/main.c b/src/main.c
index 3c2513f..d95dd59 100644
--- a/src/main.c
+++ b/src/main.c
@@ -262,4 +262,9 @@ int main()
     a = getValue('a');
     b = getValue('b');
     viereckFlaeche(a,b);
+
+    a = getValue('a');
+    b = getValue('b');
+    viereckUmfang(a,b);
+    printf("Der Umfang des Vierecks betraegt: %lf\n", (2 * a) + (2 * b));
 }