Câu trả lời:
Program tam_giac_can;
Uses crt;
Var a,b,c,s,p: real;
Begin
Clrscr;
Write('nhap a =');readln(a);
Write ('nhap b =');readln(b);
Write('nhap c =');readln(c);
If (a+b>c) and (b+c>a) and (a+c>b) and (a=b) or (a=c) or (b=c) then
Writeln('Tam giac tren la tam giac can')
else
Writeln('Khong phai tam giac can');
readln;
end.