diff --git a/src/main/java/src/TasksFrame.java b/src/main/java/src/TasksFrame.java
index bf36c1d..e9973d0 100644
--- a/src/main/java/src/TasksFrame.java
+++ b/src/main/java/src/TasksFrame.java
@@ -321,6 +321,28 @@ public class TasksFrame extends JFrame {
         jPanel.add(area);
         jPanel.add(areaRes);
 
+        JButton perimeter = new JButton("Calculate perimeter");
+        perimeter.setVisible(true);
+        perimeter.setBounds(0, 110, 180,30);
+
+        JTextField perimeterRes = new JTextField();
+        perimeterRes.setBounds(200,110,30,20 );
+        perimeterRes.setVisible(true);
+        perimeter.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String texta = a.getText();
+                String textb = b.getText();
+                Integer val_a = Integer.valueOf(texta);
+                Integer val_b = Integer.valueOf(textb);
+                Integer res = calcPerimeter(val_a, val_b);
+                perimeterRes.setText(String.valueOf(res));
+            }
+        });
+
+        jPanel.add(perimeterRes);
+        jPanel.add(perimeter);
+
     }
 
     public int calcArea(int a, int b)
@@ -329,6 +351,13 @@ public class TasksFrame extends JFrame {
         return area;
     }
 
+    public int calcPerimeter(int a, int b)
+    {
+        int perimeter = 2 * (a+b);
+        return perimeter;
+    }
+
+
 
     public void setupSumFromTo(){
 
@@ -365,6 +394,7 @@ public class TasksFrame extends JFrame {
         jPanel.add(b);
         jPanel.add(result);
         jPanel.add(sumFromTo);
+
     }
 
     public int sumCalc(int from, int to) {
diff --git a/src/test/java/src/TasksFrameTest.java b/src/test/java/src/TasksFrameTest.java
index c7de36d..d31ce6b 100644
--- a/src/test/java/src/TasksFrameTest.java
+++ b/src/test/java/src/TasksFrameTest.java
@@ -80,6 +80,17 @@ class TasksFrameTest {
 
     }
 
+    @Test
+    void setupPerimeter()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int p1 = tasksFrame.calcPerimeter(3,5);
+        assertEquals(16, p1);
+        int p2= tasksFrame.calcArea(0,7);
+        assertEquals(0,p2);
+
+    }
+
     }