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uses crt;
begin
clrscr;
writeln(5*2*pi:4:2);
writeln(5*5*pi:4:2);
readln;
end.
Program Hinh_Tamgiac_Program;
Uses crt;
Var a,b,c,s,p : real;
Begin
Clrscr;
Writeln(‘HINH TAM GIAC:’);
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) then
Begin
p:=(a+b+c)/2;
s:=sqrt(p*(p-a)*(p-b)*(p-c)); Writeln(‘Chu vi tam giac:’,2*p:4:2) ; Writeln(‘Dien tich tam giac:’,s:4:2);
End
Else
Writeln(a,’, ‘, b,’, ‘, c, ‘ khong phai la ba canh cua tam giac’) ;
Readln;
End.
Var r,s,c:real;
Begin
Write('Ban kinh = ');readln(r);
s:=3.14*r*r;
c:=2*3.14*r;
Writeln('Dien tich la ',s:10:2);
Write('Chu vi la ',c:10:2);
Readln
End.
uses crt;
var a:integer;
begin
clrscr;
readln(a);
writeln(a*4);
writeln(a*a);
readln;
end.
uses crt;
var a,b:real;
begin
clrscr;
readln(a,b);
writeln(2*(a+b):4:2);
writeln(a*b:4:2);
readln;
end.
Program Chu_nhat; uses crt;
Var a, b, S, CV: real;
Begin
Write('Nhap chieu dai:'); readln(a);
Write('Nhap chieu rong:'); readln(b);
S := a*b;
CV := (a+b)*2;
Writeln('Dien tich hinh chu nhat la:',S:3:2);
Writeln('Chu vi hinh chu nhat la:',CV:3:2);
readln;
end.
2:
uses crt;
var a,b:real;
begin
clrscr;
readln(a,b);
writen(a*b);
readln;
end.
2:
uses crt;
var a,b:real;
begin
clrscr;
readln(a,b);
writen(a*b);
readln;
end.
program chuvi_dientich_hinhtron;
uses crt;
const pi = 3.14;
var R: integer;
cv, dt: real;
begin
clrscr;
writeln; { xuong dong }
readln ( R );
cv:= 2*R*pi;
writeln ( ' chu vi = ' , cv : 8:2 );
dt:=R*R*pi;
writeln ( 'dien tich = ', dt :8:2 );
readln;
end.
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