package SatuApril;

public class triangle extends shape2D {

private double side1 = 1.0;

private double side2 = 1.0;

private double side3 = 1.0;

public triangle() {

}

public triangle(double side1, double side2, double side3) {

this.side1 = side1;

this.side2 = side2;

this.side3 = side3;

}

public double getSide1() {

return side1;

}

public void setSide1(double side1) {

this.side1= side1;

}

public double getSide2() {

return side2;

}

public void setSide2(double side2) {

this.side2 = side2;

}

public double getSide3() {

return side3;

}

public void setSide3(double side3) {

this.side3 = side3;

}

@Override /** Return area */

public double calcArea() {

double s = (side1 + side2 + side3) / 2;

double area = Math.sqrt(s * (s - side1) * (s - side2) * (s - side3));

return area;

}

}