Adds PolygonAngleCalculator.java to calculate polygon angles

Geometry/PolygonAngleCalculator.java

@@ -0,0 +1,28 @@
+import java.util.Scanner;
+
+public class PolygonAngleCalculator {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        // Prompt user for the number of sides
+        System.out.print("Enter the number of sides of the polygon (must be 3 or more): ");
+        int sides = scanner.nextInt();
+
+        // Validate the number of sides
+        if (sides < 3) {
+            System.out.println("A polygon must have at least 3 sides.");
+        } else {
+            // Calculate interior and exterior angles
+            double interiorAngle = ((sides - 2) * 180.0) / sides;
+            double exteriorAngle = 360.0 / sides;
+
+            // Display the results
+            System.out.printf("For a polygon with %d sides:\n", sides);
+            System.out.printf("Interior Angle: %.2f degrees\n", interiorAngle);
+            System.out.printf("Exterior Angle: %.2f degrees\n", exteriorAngle);
+        }
+
+        scanner.close();
+    }
+}