#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <cstring>

typedef long long ll;
using namespace std;

#define mod 1000000009
#define INF 10000000
#define LLINF 2000000000000000000LL
#define PI 3.1415926536

#define SIZE 101


int main(){
    double x,y,top_x=-10,top_y=-10;
    int n;
    
    scanf("%d",&n);
    
    for(int i=0;i<n;i++){
        top_x=-10;
        top_y=-10;
    
        for(int i=0;i<6;i++){
            scanf("%lf%lf",&x,&y);
            
            if(-1e-12<=y && -1e-12<=x && top_x<x){
                top_x=x;
                top_y=y;
            }
        }
    
        printf("%.10lf\n",abs(asin(top_y)/PI*180));
    }
    
    return 0;
}