import java.util.*;
// package id.filkom.nim_195150401111048;
class BidangDatar{
private String nama;
private int panjang;
private int lebar;
public BidangDatar(int panjang,int lebar){
this.panjang = panjang;
this.lebar = lebar;
}
public int getPanjang(){
return panjang;
}
public int getLebar(){
return lebar;
}
public float getLuas(){
float temp=this.panjang*this.lebar;
return temp;
}
}
class Segitiga extends BidangDatar{
public Segitiga(int panjang,int lebar){
super(panjang,lebar);
}
@Override
public float getLuas(){
float temp=0.5f*getPanjang()*getLebar();
return temp;
}
}
public class sol{
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print("Masukkan jenis : ");
String nama = in.nextLine();
System.out.print("Masukkan panjang : ");
int pnjg = in.nextInt();
System.out.print("Masukkan lebar : ");
int lbr = in.nextInt();
if(nama.equalsIgnoreCase("segitiga")){
Segitiga a = new Segitiga(pnjg,lbr);
System.out.printf("Luas %s : %.2f",nama,a.getLuas());
} else {
BidangDatar a = new BidangDatar(pnjg,lbr);
System.out.printf("Luas %s : %.2f",nama,a.getLuas());
}
}
}