#include <bits/stdc++.h>
using namespace std;

typedef long double ld;

const ld EPS = 1e-14;

const ld PI = acos(-1);

int main(){
    int n;
    cin >> n;
    while(n--){
        ld a[6], b[6];
        for(int i = 0; i < 6; i++){
            cin >> a[i] >> b[i];
        }
        ld left = 0, right = 50;
        for(int _ = 0; _ < 5000; _++){
            ld mid = (left + right) / 2;
            ld ra = mid * PI / 180.0;
            ld x = cos(ra);
            for(int i = 0; i < 6; i++){
                if(a[i] < 0.5 || b[i] < 0) continue;
                if(x - a[i] < -EPS) right = mid;
                else if(x - a[i] > EPS)  left = mid;
                break;
            }
        }
        cout << setprecision(13) << left << endl;
    }
    return 0;
}