diff --git a/src/funktion.c b/src/funktion.c
index 15436ad..88ea51e 100644
--- a/src/funktion.c
+++ b/src/funktion.c
@@ -327,4 +327,7 @@ double kreisUmfang(double r) {
 double dreieckFlaeche(double a, double b, double c) {
     double s = (a + b + c) / 2;
     return sqrt(s * (s - a) * (s - b) * (s - c));
+}
+double dreieckUmfangn(double a, double b, double c) {
+    return a + b + c;
 }
\ No newline at end of file
diff --git a/src/funktion.h b/src/funktion.h
index 5b06b9a..cab2fed 100644
--- a/src/funktion.h
+++ b/src/funktion.h
@@ -56,5 +56,6 @@ double grundwert(double ein, double prozent);
 double kreisFlaeche(double r);
 double kreisUmfang(double r);
 double dreieckFlaeche(double a, double b, double c);
+double dreieckUmfangn(double a, double b, double c);
 
 #endif
diff --git a/src/main.c b/src/main.c
index ea6fb21..8b51d38 100644
--- a/src/main.c
+++ b/src/main.c
@@ -253,4 +253,10 @@ int main()
     b = getValue('b');
     c = getValue('c');
     dreieckFlaeche(a,b,c);
+
+    a = getValue('a');
+    b = getValue('b');
+    c = getValue('c');
+    dreieckUmfangn(a,b,c);
+    printf("Der Umfang des Dreiecks betraegt: %f\n", a + b + c);
 }