Siti Fidyatul H. Agoan

public class luasSegitiga {
    public static void main (String[] args) {
    d   public static void main (String[] args) {
    double luas;
    int alas = 20;
    int tinggi = 15;
    luas = alas * tinggi / 2;
    System.out.println("luas segitiga = "+luas);
    }
    }



public class luasPersegipanjang {
    public static void main (String[] args) {
    double luas;
    int panjang = 6;
    int lebar = 4;
    luas = panjang * lebar;
    System.out.println("luas persegi panjang = "+luas);
    }
    }


public class luasLingkaran {
    public static void main (String[] args) {
    double luas;
    int r = 15;
    double pi = 3.14;
    luas = pi * (r * r);
    System.out.println("luas lingkaran = "+luas);
    }
    }


public class diskon {
    public static void main (String[] args) {

    int harga = 25000;
    double diskon = 0.5;
    diskon = harga * diskon;
    System.out.println("diskon = "+diskon);
    }
    }