[Rise]

var x = [0,1,0,6],
	y = [2,0,1,6],
	n = x.length;
	
var sqrt = Math.sqrt, 
	pow  = Math.pow;
	
var A, An = n - 2, AB,
	B, Bn = n - 1, BC,
	C, Cn = n - 0, CA,
	P, Pn = [], 
	S, Sn = [];
	
for (A = 0; A < An; A++) {
	
	for (B = A + 1; B < Bn; B++) {
		
		for (C = B + 1; C < Cn; C++) {
				
			if ((x[A] - x[C]) * 
				(y[B] - y[C]) == 
				(x[B] - x[C]) * 
				(y[A] - y[C])) continue;
				
			AB = sqrt(pow(x[A] - x[B], 2)
					+ pow(y[A] - y[B], 2));
				
			BC = sqrt(pow(x[B] - x[C], 2)
					+ pow(y[B] - y[C], 2));
				
			CA = sqrt(pow(x[C] - x[A], 2)
					+ pow(y[C] - y[A], 2));
				
			P = AB + BC + CA;
			Pn.push(P); P /= 2;
				
			S = sqrt(P * (P - AB) * (P - BC) * (P - CA));
			Sn.push(S);
		} 
	}
}
	
console.table({P: Pn, S: Sn});