Ответы на вопрос:
Program triangle; uses crt; var a,b,c,p,s: real; begin clrscr; write('a = '); readln(a); write('b = '); readln(b); write('c = '); readln(c); writeln; p: =a+b+c; writeln('p = ', p: 0: 3); p: =p/2; s: = sqrt(p*(p-a)*(p-b)*(p-c)); writeln('s = ', s: 0: 3); readln; end.
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