diff --git a/shkang_01.py b/shkang_01.py
new file mode 100644
index 0000000..fcfb002
--- /dev/null
+++ b/shkang_01.py
@@ -0,0 +1,20 @@
+def cir_area() :
+    global r
+    result = r * r * 3.14
+    return result
+
+def cir_length() :
+    global r
+    result = 2 * 3.14 * r
+    return result
+
+r = float(input("반지름을 입력하세요: "))
+area = cir_area()
+length = cir_length()
+print("원의 면적 : %.1f, 원주의 길이 :%.1f" % (area, length ))
+
+
+
+    
+    
+