Question

In Java, write a class for a Triangle Object that contains,

Private instance variables:

- three doubles: a,b,c, representing the three sides of the Triangle

- constructor with three double as args, which are put into three instances variables

Public Instance Methods:

- getPerimeter: computes the perimeter of the triangle(the sum of the three sides), returns a double

- getArea: computes the area of the triangle using Heron's formula: Area = (s*(s-a)*(s-b)*(s-c))^0.5, where s = 0.5*(the triangle's perimeter), returns a double

- isARightTriangle: determines if the triangle satisfies c^2 = a^2 + b^2 (assume c is the longest side), returns a boolean(T/F)

(Note: Use Math.pow(double num, double power) from the Java Math class for exponents indicated by ^ or use Math.sqrt for the0.5 power)

Answer 1

public class Triangle {
  private double a,b,c;

  public Triangle(double a, double b, double c) {
    this.a = a;
    this.b = b;
    this.c = c;
  }

  public double getPerimeter(){
    return a+b+c;
  }

  public double getArea(){
    double s = (a+b+c)/2.0;
    return s*(s-a)*(s-b)*(s-c);
  }

  public boolean isARightTriangle(){
    return Math.pow(a,2)+Math.pow(b,2)==Math.pow(c,2);
  }
}