Triangle

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

#define int long long
#define endl "\n"
#define pb push_back
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define IN freopen("input.txt","r",stdin);
#define OUT freopen("output.txt","w",stdout);

const int N = 2e5 + 5;
const double pi = acos(-1);

int32_t main()
{
    IOS;
    cout << fixed << setprecision(8);
    double a,b,c;
    double r=0,area=0,side=0,peri=0,h=0;
    cin >> a >> b >> c;

    r = (c*pi)/180;
    area = (a*b*sin(r))/2;
    side = sqrt(a*a + b*b - 2*a*b*cos(r));
    peri = a+b+side;
    h = b*sin(r);

    cout << area << endl << peri << endl << h << endl;

	return 0;
}