diff --git a/sio2/SISR/07-python/rayon.py b/sio2/SISR/07-python/rayon.py
new file mode 100644
index 0000000..56c5c9f
--- /dev/null
+++ b/sio2/SISR/07-python/rayon.py
@@ -0,0 +1,5 @@
+#!/usr/bin/python3
+
+R=float(input("Donnez la valeur du rayon du cercle : "))
+perimetre= 2*3.141592*R 
+print("Le perimetre vaut " , perimetre)