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

typedef long long int ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pair<int, int> > vii;

#define rrep(i, m, n) for(int (i)=(m); (i)<(n);  (i)++)
#define erep(i, n)    for(int (i)=1; (i)<=(n); (i)++)
#define  rep(i, n)    for(int (i)=0; (i)<(n);  (i)++)
#define rrev(i, m, n) for(int (i)=(n)-1; (i)>=(m); (i)--)
#define erev(i, n)    for(int (i)=(n); (i)>=1; (i)--)
#define  rev(i, n)    for(int (i)=(n)-1; (i)>=0; (i)--)
#define EACH(v)       (v).begin(), (v).end()
#define minup(m, x)   (m=min(m, x))
#define maxup(m, x)   (m=max(m, x))
#define mp            make_pair
#define pb            push_back

#define INF 1000000000
#define MOD 1000000009
#define EPS 1E-9

int t;
double tx[6], ty[6];
double x, y;

int main()
{
  cin >> t;

  rep(i, t){
    rep(j, 6) cin >> tx[j] >> ty[j];
    rep(j, 6) if(1/2.0<=tx[j]&&tx[j]<=1 && 0<=ty[j]&&ty[j]<=sqrt(3)/2.0){
      x = tx[j];
      y = ty[j];
    }
    printf("%.10f\n", atan2(y, x)*180/3.14159265358979);
  }

  return 0;
}