uses crt;

var a,b,c:real;

begin

clrscr;

readln(a,b,c);

if (a>0) and (b>0) and (c>0) and (a+b>c) and (a+c>b) and (b+c>a) then 

begin

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

else writeln('Day khong la tam giac deu');

end

else writeln('Day khong la ba canh trong mot tam giac');

readln;

end.

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")

#include <iostream>
using namespace std;
int main()
{
    int a,b,c,kt;
    cout<<"Nhap a=";
    cin>>a;
    cout<<"Nhap b=";
    cin>>b;
    cout<<"Nhap c=";
    cin>>c;
    if ((a>0) and (b>0) and (c>0) and (a+b>c) and (a+c>b) and (b+c>a))
    {
        kt=0;
        if (a*a==b*b+c*c) kt=1;
        if (b*b==a*a+c*c) kt=1;
        if (c*c==a*a+b*b) kt=1;
        if ((a==b) and ((a<c) or (a>c)) and ((b<c) or (b>c))) kt=2;
        if ((b==c) and ((b<a) or (b>a)) and ((c<a) or (c>a))) kt=2;
        if ((c==a) and ((c<b) or (c>b)) and ((a<b) or (a>b))) kt=2;
        if ((a==c) and (b==c)) kt=3;
        if (kt==2) cout<<"Day la tam giac can";

else cout<<"Day khong la tam giac can";
    }
    else cout<<"Day khong la ba canh trong mot tam giac";
    return 0;
}

uses crt;

var a,b,c:real;

begin

clrscr;

repeat

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

write('Nhap c='); readln(c);

until (a>0) and (b>0) and (c>0);

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

begin

writeln('La do dai ba canh cua tam giac');

writeln('Chu vi tam giac la: ',a+b+c:4:2);

end

else writeln('Khong phai la do dai 3 canh cua tam giac');

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.

Program Bai1;

Uses crt;

Var a,b,c:integer;

Begin

CLRSCR;

Write('a='); Readln(a);

Write('b='); Readln(b);

Write('c='); Readln(c);

If (a*a=b*b+c*c) then Write('a,b,c la cac canh cua 1 tam giac vuong')

else('a,b,c khong phai la cac canh cua 1 tam giac vuong');

Readln

END.

program kiem_tra;

uses crt;

var a,b,c:integer;

begin

write('nhập số a');readln(a);

write('nhập số b');readln(b);

write('nhập số c');readln(c);

if(a*a=b*b+c*c)or(b*b=c*c+a*a)or(c*c=b*b+a*a)then writeln('đây là tam giác vuông') else writeln('đây là tam giác thường');

readln;

end.

program tamgiac;

uses crt;

var a,b,c:integer;

begin

clrscr;

writeln('nhap ba canh cua tam giac'); readln(a,b,c);

if a+b>c and a+c>b and b+c>a then write(a,' ',b,' ',c 'la ba canh cua tam giac') else write(a,' ',b,' ',c 'khong la ba canh cua tam giac');

readln

end.

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.