import std.algorithm, std.array, std.container, std.range;
import std.string, std.conv;
import std.math, std.bigint, std.bitmanip, std.random;
import std.stdio, std.typecons;

alias Tuple!(real, "x", real, "y") point;

void main()
{
  auto t = readln.chomp.to!int;

  foreach (_; 0..t) {
    readln;
    auto pi = iota(6).map!((_) {
      auto rd = readln.split.map!(to!real);
      return point(rd[0], rd[1]);
    });

    auto ri = pi
      .map!(p => atan2(p.y, p.x) / PI * 180 + 1e-07)
      .map!(x => x < 0 ? x + 360 : x)
      .array;
    ri.sort();

    writefln("%f", ri.front);
  }
}