C1S1-Dima-6.1

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

double length(int *x1,int *x2)
{
    double length=sqrt(  pow((x2[0]-x1[0]), 2 ) + pow((x2[1]-x1[1]), 2)  );
    return length;
}

double perimeter(int tr[3][2])
{
    double perim = length(tr[0], tr[1]) + length(tr[1], tr[2]) + length(tr[2], tr[0]);
    return perim;
}

double findarea(int tr[3][2])
{
    double area = 0.5* abs((tr[1][0]-tr[0][0])*(tr[2][1]-tr[0][1])-(tr[2][0]-tr[0][0])*(tr[1][1]-tr[0][1]) );
    return area;
}

int main()
{
    int tr1[3][2] = {{0,1},{1,0},{1,1}};
    int tr2[3][2] = {{0,2},{2,0},{2,2}};
    int tr3[3][2] = {{0,3},{3,0},{3,3}};
    double summperim = perimeter(tr1) + perimeter(tr2) + perimeter(tr3);
    double summarea = findarea(tr1)+findarea(tr2)+findarea(tr3);
    printf("Summa perimetriv: %lf\nSumma plosh4: %lf",summperim,summarea);
}