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Oct 23rd, 2018
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  1. uses crt;
  2. var a,b,c,p:real;
  3. begin
  4. clrscr;
  5. repeat
  6. write('a=');readln(a);
  7. write('b=');readln(b);
  8. write('c=');readln(c);
  9. if (abs(a-b)>c)or(abs(a+b)<c)
  10. then writeln('Это не треугольник! Повторите ввод.');
  11. until (abs(a-b)<c) and( abs(a+b)>c);
  12. p:=(a+b+c)/2;
  13. writeln('Полупериметр=',p:0:1);
  14. writeln('Длины биссектрис равны:');
  15. writeln((2*(sqrt(b*c*p*(p-a)))/(b+c)):0:1);
  16. writeln((2*(sqrt(a*c*p*(p-b)))/(a+c)):0:1);
  17. write((2*(sqrt(b*a*p*(p-c)))/(b+a)):0:1);
  18. readln
  19. end.
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