task4

#include <stdio.h>
#include <math.h>

int main()
{
    int a, b, c;
    printf("a = ");
    scanf("%d", &a);
    printf("b = ");
    scanf("%d", &b);
    printf("c = ");
    scanf("%d", &c);
    if(a + b > c && a + c > b && c + b > a)
    {
        int p = a + b + c;
        printf("%Perimeter is %d\n", p);
        double semip = (double) p / 2;
        double area = sqrt(semip*(semip-a)*(semip-b)*(semip-c));
        printf("Area is %.2f\n", area);
        if(a == b && b == c)
        {
            printf("Ravnostranen\n");
        }else if(a != b && b != c && c != a)
        {
            printf("Raznostranen\n");
        }else
        {
            printf("Ravnobedren\n");
        }
        if(a*a + b*b == c*c || a*a + c*c == b*b || b*b + c*c == a*a)
        {
            printf("Pravougulen");
        }else if(a*a + b*b > c*c && a*a + c*c > b*b && b*b + c*c > a*a)
        {
            printf("Ostrougulen");
        }else
        {
            printf("Tupougulen");
        }
    }
    return 0;
}