Question

Giúp em với ạ tin 11 trong pascal ạ

Answer 1

uses crt;

var xa,ya,xb,yb,xc,yc,p,s,ab,bc,ac:real;

begin

clrscr;

readln(xa,ya,xb,yb,xc,yc);

ab:=sqrt(sqr(xa-xb)+sqr(ya-yb));

ac:=sqrt(sqr(xa-xc)+sqr(ya-yc));

bc:=sqrt(sqr(xb-xc)+sqr(yb-yc));

p:=(ab+bc+ac)/2;

s:=sqrt(p*(p-ab)*(p-ac)*(p-bc));

writeln(s:4:2);

readln;

end.