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- #include<stdio.h>
- #include<conio.h>
- #include<math.h>
- int main()
- {
- float ncv,s,a,b,c;
- printf("nhap vao canh a cua tam giac=");
- scanf("%f",&a);
- printf("\nnhap vao canh b cua tam giac=");
- scanf("%f",&b);
- printf("\nnhap vao canh c cua tam giac=");
- scanf("%f",&c);
- if (a+b>c && b+c>a && a+c>b) {
- ncv=float(a+b+c)/2 ;
- s=sqrt(ncv*(ncv-a)*(ncv-b)*(ncv-c));
- printf("dien tich tam giac la %0.2f",s); } else printf("3 canh tren khong phai 3 canh cua tam giac");
- getch();
- }
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