#include <iostream>
#include <set>
#include <cmath>
#include <cstdlib>
#include <cstdio>
using namespace std;

const double eps = 1e-9;

double root(double a, double b, double c){
    return (-b + sqrt(b * b - 4 * a * c)) / (2 * a);
}

int main(){
    int T;
    cin >> T;
    while (T--){
        int no, k, m;
        cin >> no >> k >> m;
        double ans = 1.0;
        double t = 1 - cos(2 * M_PI / k);
        double r1 = root(2 - t, - 2 * t, - t);
        if (m == 1)
            printf("%d %.3f %.3f\n", no, r1, 2 * r1 * (k + M_PI));
        else{
            double cotT = 1 / tan(2 * M_PI / k);
            //double r2 = r1 + r1 * cos(2 * M_PI / k) + 1 + sqrt(r1 * r1 + r1 * r1 * cotT * cotT + 2 * r1 * r1 *cotT + 2*r1 * cotT ) * cotT;
            double lo = r1;
            int gap = 1000;
            double hi = gap * 10 * r1;
            double ans = M_PI * (0.5 + 1.0 / k);
            double r2 = root(tan(ans) * tan(ans), -2*(r1 + tan(ans) + r1 * tan(ans)), 2* r1 + 1);
            for (int i = 0; i < gap; i++){
                double mid = (lo + hi) / 2;
                if (asin(mid / (r1 + mid)) + acos(r1 / (r1 + mid)) < ans)
                    lo = mid;
                else
                    hi = mid;
            }
            r2 = lo;
            double sim = r2 / r1;
            double mr = r2;
            for (int i = 0; i < m - 2; i++)
                mr *= sim;
            printf("%d %.3f %.3f\n", no, mr, 2 * mr * (k + M_PI));
        }
    }
}