Tugas Kelas PBOA 2

Membuat class untuk setiap bentuk geometri yang berisi method luas dan keliling.

Class Main:

 public class Main  
 {  
   public static void main(){  
     //Scanner ps = new Scanner(System.in);  
     Lingkaran aCircle;  
     aCircle = new Lingkaran();  
     aCircle.x = 10; aCircle.y = 10; aCircle.r = 5;  
     double luas = aCircle.luas();  
     double keliling = aCircle.keliling();  
     System.out.println("Lingkaran:");  
     System.out.println("Titik pusat: ("+aCircle.x+","+aCircle.y+")");  
     System.out.println("Jari-jari: "+aCircle.r);  
     System.out.println("Luas: "+luas);  
     System.out.println("Keliling: "+keliling);  
     System.out.println("");  
     Segitiga aSegitiga;  
     aSegitiga = new Segitiga();  
     aSegitiga.a = 8; aSegitiga.t = 3;   
     double s = aSegitiga.slope();  
     luas = aSegitiga.luas();  
     keliling = aSegitiga.keliling();  
     System.out.println("Segitiga:");  
     System.out.println("Sisi: "+s);  
     System.out.println("Alas: "+aSegitiga.a);  
     System.out.println("Tinggi: "+aSegitiga.t);  
     System.out.println("Luas: "+luas);  
     System.out.println("Keliling: "+keliling);  
     System.out.println("");  
   }  
 }  

Class Persegi:

 public class Persegi  
 {  
   public double s;  
   public double keliling(){  
     return 4*s;  
   }  
   public double luas(){  
     return s*s;  
   }  
 }  

Class Lingkaran:

 public class Lingkaran  
 {  
   public double x,y,r;  
   public double keliling(){  
     return 2*3.14*r;  
   }  
   public double luas(){  
     return 3.14*r*r;  
   }  
 }  

Class PersegiPanjang:

 public class PersegiPanjang  
 {  
   public double p,l;  
   public double keliling(){  
     return 2*p+2*l;  
   }  
   public double Luas(){  
     return p*l;  
   }  
 }  

Class BelahKetupat:

 public class BelahKetupat  
 {  
   public double d1,d2;  
   public double s(){  
     return Math.sqrt((d1/2)*(d1/2) + (d2/2)*(d2/2));  
   }  
   public double luas(){  
     return (d1*d2)/2;  
   }  
   public double keliling(){  
     return 4*s();  
   }  
 }  

Class JajarGenjang:

 public class JajarGenjang  
 {  
   public double a,b,t;  
   public double luas(){  
     return a*t;  
   }  
   public double keliling(){  
     return 2*(a+b);  
   }  
 }  

Class Segitiga:

 public class Segitiga  
 {  
   public double a,t;  
   public double slope(){  
     return Math.sqrt((a/2)*(a/2) + (t*t));  
   }  
   public double luas(){  
     return (a*t)/2;  
   }  
   public double keliling(){  
     return 2*slope()+a;  
   }  
 }