diff --git a/lab42.py b/lab42.py
new file mode 100644
index 0000000..84759db
--- /dev/null
+++ b/lab42.py
@@ -0,0 +1,35 @@
+import math
+
+class Point:
+
+    def __init__(self, x, y):
+        self.__x = float(x)
+        self.__y = float(y)
+
+    def getx(self):
+        return self.__x
+
+    def gety(self):
+        return self.__y
+
+    def distance_from_xy(self, x, y):
+        return math.hypot(self.__x - x, self.__y - y)
+
+    def distance_from_point(self, point):
+        return self.distance_from_xy(point.getx(), point.gety())
+
+
+class Triangle:
+
+    def __init__(self, vertice1, vertice2, vertice3):
+        self.__vertici = [vertice1, vertice2, vertice3]
+
+    def perimeter(self):
+        v = self.__vertici
+        lato1 = v[0].distance_from_point(v[1])
+        lato2 = v[1].distance_from_point(v[2])
+        lato3 = v[2].distance_from_point(v[0])
+        return lato1 + lato2 + lato3
+
+triangle = Triangle(Point(0, 0), Point(1, 0), Point(0, 1))
+print(triangle.perimeter())