Question

A triangle is said to be an 'Equable Triangle', if the area of the triangle is equal to its perimeter. Write a program to enter three sides of a triangle. Check and print whether the triangle is equable or not.

For example, a right angled triangle with sides 5, 12 and 13 has its area and perimeter both equal to 30. 

Answer 1

import java.util.*; 
public class Q2 
{public static void main(String args[]) 
{
Scanner in = new Scanner(System.in);
int a, b, c, sp, peri; // sp --> semi perimeter 
double area; 
System.out.println("Enter the three sides of the triangle");
a = in.nextlnt(); 
b = in.nextlnt();
c = in.nextlnt(); 
peri = a + b + c; 
sp = peri / 2;
area = Math.sqrt(sp * (sp − a) * (sp − b) * (sp − c)); // Heron's formula
if (peri == area) 
System.out.println("The triangle is Equable");
else
System.out.println("The triangle is not Equable");
}}