Viết chương trình nhập vào 3 số thực dương a,b,c kiểm tra xem 3 số trên có tạo thành 3 cạnh của tam giác không, nếu có hãy tính diện tích tam giác theo công thức hê rông S=căn p(p-a)(p-b)(p-c)

2 câu trả lời

uses crt;

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

begin

clrscr;

write('nhap ba so a, b, c : ');readln(a, b, c);

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

begin

writeln('ba so tao thanh tam giac ');

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

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

writeln('dien tich tam giac : ', s:3:1);

end

else writeln('ba so khong tao thanh tam giac ');

readln

end.

Program TAMGIAC;
Uses crt;
Var a,b,c,s,p : real;
Begin
    Clrscr;
    Write('a = ');readln(a);
    Write ('b = ');readln(b);
    Write('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
    write(a:2:1,', ',b:2:1,', ',c:2:1,' khong phai la ba canh cua tam giac');
    Readln;
End.

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giup e voi I/ Supply the correct form of the verbs in brackets 1. You (think) ……………………… collecting stamps costs much money? 2. Every year, my mother (give) ……………………… me a nice doll on my birthday. 3. Jenny says she loves collecting pens but she (not/continue) ……………………… this hobby from next year. 4. If you wash your hands more, you (have)……………………. less chance of catching flu. 5. Getting plenty of rest is very good. It (help)…………………. you to avoid depression. 6. Mr. John (be) ……………………… principal of our school since last year. 7. I (see) ……………………… a car accident on this corner yesterday. 8. We like (come)……………………to school by bus, but we hate (stand)………………………. and (wait) …………………… in the rain. 9. ……………………… (you/ ever/ meet) anyone famous? 10. My mother (come) ……………………… to stay with us next weekend. 11. When he lived in Manchester, he (work) ……………………… in a bank. 12. We (be) ……………………… students for four years. 13. We are planting trees around our school now. Our school (be) ……………………… surrounded by a lot of green trees. 14. What ……………………… your father usually ……………………… (do) in the evenings? 15. My sister likes (cook) ……………………… very much. She can cook many good foods. 16. My father says when he's retired, he (go) …………………… back to his village to do the gardening. 17. They want (buy) ……………………… some meat for dinner. 18. Linh is my best friend. We (know) ……………………… each other for 5 years. 19. I enjoy (fish) ……………………… because it is relaxing. 20. How about (go) ……………………… to the movie theatre?

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