Cat and MyMath task

src/Cat.java

@@ -0,0 +1,7 @@
+public class Cat extends Pet {
+
+    void voice(){
+        System.out.println("Я кіт- Мяууу-Мяууу");
+    }
+
+}

src/Cow.java

@@ -0,0 +1,7 @@
+public class Cow extends Pet {
+
+    void voice(){
+        System.out.println("Я корова- Мууу-Мууу");
+    }
+
+}

src/Dog.java

@@ -0,0 +1,7 @@
+public class Dog extends Pet {
+
+    void voice(){
+        System.out.println("Я пес- Гаууу-Гаууу");
+    }
+
+}

src/Main.java

@@ -0,0 +1,5 @@
+public class Main {
+
+    public static void main(String[] args) {
+    }
+}

src/MyMath.java

@@ -0,0 +1,24 @@
+public class MyMath {
+
+    static final double PI = 3.14159265358979323846264338327950288;
+    static final double PYTHAGORASCONST = 1.41421356237309504880168872420969808;
+    static final double FEODORSCONST = 1.73205080756887729352744634150587237;
+    static final double CATALANSCONST = 0.91596559417721901505460351493238411;
+
+    static int rectanglePerimeter(int a, int b){
+        return (a + b) * 2;
+    }
+
+    static int trianglePerimeter(int a, int b, int c){
+        return a + b + c;
+    }
+
+    static int triangleSquare(int a, int h){
+        return a * h / 2;
+    }
+
+    static int rectangleSquare(int a, int b){
+        return a * b;
+    }
+}
+

src/Pet.java

@@ -0,0 +1,5 @@
+public abstract class Pet {
+
+    abstract void voice();
+
+}