#include <stdio.h>
int main(void) {
float a, b, c,maior;
scanf("%f %f %f",&a
,&b
,&c
); if (b > a ){
maior = b;
b = a;
a = maior;
} if(c > a){
maior=c;
c=a;
a=maior;
}else if(c < b ){
maior =c;
c=b;
b=maior;
}
if(a >= b+c){
printf("NAO FORMA TRIANGULO\n");
} else if(a*a==(b*b)+c*c){
printf("TRIANGULO RETANGULO\n");
} else if(a*a > (b*b)+c*c){
printf("TRIANGULO OBTUSANGULO\n");
} else if(a*a < (b*b)+c*c){
printf("TRIANGULO ACUTANGULO\n");
} if(a==b && b==c ){
printf("TRIANGULO EQUILATERO\n");
}else if(a==b || b==c){
printf("TRIANGULO ISOSCELES\n"); }
return 0;
}
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