diff --git a/Kasutus1.class b/Kasutus1.class
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diff --git a/Kasutus1.java b/Kasutus1.java
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+++ b/Kasutus1.java
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+import java.util.Scanner;
+
+public class Kasutus1{
+	public static void main(String[] args){
+		Scanner s = new Scanner(System.in);
+		
+		Liides pythagoroseArvutaja = new Pythagoros();
+		System.out.println("a: ");
+		double a=s.nextDouble();
+		System.out.println("b: ");
+		double b=s.nextDouble();
+		System.out.println("c: "+ pythagoroseArvutaja.arvutus(a,b));
+	}
+}
+
+/*
+[melissab@greeny t07liides]$ javac *.java
+[melissab@greeny t07liides]$ java Kasutus1
+a:
+6
+b:
+8
+c: 10.0
+
+*/
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diff --git a/Liides.class b/Liides.class
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diff --git a/Liides.java b/Liides.java
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+public interface Liides{
+	public double arvutus(double x, double y);
+	
+}
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diff --git a/Pythagoras.java b/Pythagoras.java
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+++ b/Pythagoras.java
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+public class Pythagoros implements Liides{
+	public double arvutus(double x, double y){
+		return Math.sqrt(Math.pow(x,2) + Math.pow(y,2));
+	}
+}
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diff --git a/Pythagoros.class b/Pythagoros.class
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diff --git a/Pythagoros.java b/Pythagoros.java
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+++ b/Pythagoros.java
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+public class Pythagoros implements Liides{
+	public double arvutus(double x, double y){
+		return Math.sqrt(Math.pow(x,2) + Math.pow(y,2));
+	}
+}
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