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Apr 25th, 2018
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  1. class Cirkel extends Vorm {
  2. public Punt p1, straal;
  3.  
  4. Cirkel(){}
  5.  
  6. Cirkel(double r){
  7. straal = new Afstand(d2.lengte, d2.eenheid);
  8. }
  9.  
  10. double oppervlakte(){
  11. straal = Math.abs(d2.x.converteren());
  12. return(straal * straal * Math.PI);
  13. }
  14.  
  15. double omtrek(){
  16. straal = Math.abs(d2.x.converteren());
  17. return(straal * 2 * Math.PI);
  18. }
  19. }
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