a = float(input("Nhap a : "))
b = float(input("Nhap b : "))
c = float(input("Nhap c : "))
if a+b>c and a+c>b and b+c>a:
    if a==b or a==c or b==c:
        if a==c==b:
            print("Day la ba canh cua tam giac deu")
        else:
            print("Day la ba canh cua tam giac can")
    elif (a**2)+(b**2)==c**2 or (a**2)+(c**2)==b**2 or (c**2)+(b**2)==a**2:
        print("Day la ba canh cua tam giac vuong")
    else:
        pass
else:
    print("Day khong phai ba canh cua tam giac")

progam ban_tu_chon;

uses crt;

var a,b,c :real;

BEGIN

clrscr;

write('nhap canh a thu nhat'); Read(a);

write('nhap canh b thu hai:'); Readln(b);

write('nhap canh c thu ba'); Readln(c);

if (a>=b+c) or (b>=c+a) or (c>=a+b) then write('ba canh tren khong phai cua mot tam giac')

else

if (a=b) or (b=c) or (c=a) then write('tam giac tren la tam giac can');

else

if a=b=c then write('tam giac tren la tam giac deu')

else

if (a*a=b*b+c*c) or (b*b=c*c+a*a) or (c*c=a*a+b*b) then write('tam giac tren la tam giac vuong');

readln;

END.

var a,b,c,s,p: real;

begin

write('Nhap canh thu nhat: '); readln(a);

write('Nhap canh thu hai: '); readln(b);

write('Nhap canh thu ba: '); readln(c);

if (a+b>c) and (b+c>a) and (c+a>b) then 

begin

p:=(a+b+c)/2;

s:=sqrt(p*(p-a)*(p-b)*(p-c));

writeln('Chu vi tam giac la ',2*p:5:2, '(dvdd)');

writeln('Dien tich tam giac la: ',s:5:2, '(dvdt)');

if (a=b) and (b=c) then writeln('Day con la tam giac deu') else

if (a=b) or (b=c) or (c=a) then writeln('Day la tam giac can') else

if (a*a+b*b=c*c) or (b*b+c*c=a*a) or (c*c+a*a=b*b) then writeln('Day la tam giac vuong') else

writeln('Day la tam giac thuong');

if ((a=b) or (b=c) or (c=a)) and ((a*a+b*b=c*c) or (b*b+c*c=a*a) or (c*c+a*a=b*b)) then writeln('Day la tam giac vuong can')

end

else writeln(a:5:2,',',b:5:2,',',c:5:2,' khong la do dai mot tam giac');

end.

help me !!!!!!

Program HOC24;

var a,b,c: integer;

begin

write('Nhap canh thu nhat AB: '); readln(a);

write('Nhap canh thu hai BC: '); readln(b);

write('Nhap canh thu ba CA: '); readln(c);

if a*a+c*c=b*b then write('Tam giac vuong tai A');

if a*a+b*b=c*c then write('Tam giac vuong tai B');

if b*b+c*c=a*a then write('Tam giac vuong tai C');

readln

end.

uses crt;
var a, b, c: real;
begin
clrscr;
 writeln('Kiem Tra Tam Giac');
    write('Nhap Ba Canh a, b, c:'); readln(a, b, c);
    if (a+b>c) and (a+c>b) and (b+c>a) then 
    begin
     writeln('Do La Ba Canh Tam Giac');
     if (a * a + b * b = c * c) or (a * a + c * c = b * b) or (b * b + c * c = a * a) then 
      writeln('Tam Giac Vuong')
     else if (a = b) or (a = c) or (b = c) then 
     begin
      if (a = b) and (b = c) then 
       writeln('Tam Giac Deu')
      else 
       writeln('Tam Giac Can');
     end
     else writeln('Tam Giac Thuong');
    end
    else write('Khong Phai Tam Giac');
    readln
end.