Triangle.java

// Class Triangle is now a "certified" shape
public class Triangle implements Shape {
    private double a;
    private double b;
    private double c;
    

    public Triangle(double a, double b, double c) {
        this.a = a;
        this.b = b;
        this.c = c;
    }
    
    @Override
    public double caclulateArea() {
        double s = (a + b + c) / 2.0;
        return Math.sqrt(s * (s - a) * (s - b) * (s - c));
    }

    @Override
    public double calculatePerimeter() {
        return a + b + c;
    }

	public double getA() {
		return a;
	}

	public void setA(double a) {
		this.a = a;
	}

	public double getB() {
		return b;
	}

	public void setB(double b) {
		this.b = b;
	}

	public double getC() {
		return c;
	}

	public void setC(double c) {
		this.c = c;
	}
    
    
}