d1=sqrt((X(2)-X(1))^2+(Y(2)-Y(1))^2); %distancia de A hasta B d2=sqrt((X(3)-X(1))^2+(Y(3)-Y(1))^2); %distancia de A hasta C d3=sqrt((X(3)-X(2))^2+(Y(3)-Y(2))^2); %distancia de B hasta C s=(d1+d2+d3)/2; %Semiperimetro y=sqrt(s*(s-d1)*(s-d2)*(s-d3)) %Fórmula de Herón
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