// UVa 10451 - Ancient Village Sports #include <iostream> #include <math.h> #include <stdio.h> using namespace std; double pi = 2 * acos(0); int main() { int n, t = 0; double A; while (cin >> n >> A && n >= 3) { t++; double At = A / n; double alpha = 360.0 / n; double ganma = 90 - 180.0 / n; double rc = sqrt(2 * At / sin(alpha / 180 * pi)); double b = rc * sin(alpha / 180 * pi) / sin(ganma / 180 * pi); double h = 2 * At / b; double Ac = rc * rc * pi; double Ai = h * h * pi; printf("Case %d: %.5f %.5f\n", t, Ac - A, A - Ai); } return 0; }
Wednesday, May 13, 2015
UVa 10451 - Ancient Village Sports
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Can you give me the source of formula for finding radius of inner circle ??
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