34 lines
867 B
C++
34 lines
867 B
C++
#include<cstdlib>
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#include<algorithm>
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#include<cstring>
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#include<iostream>
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#include<cstdio>
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#include<vector>
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#include<cmath>
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#include<map>
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#define pi (2*acos(0))
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#define maxn 1000000
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using namespace std;
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int main()
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{
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int t;
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scanf("%d", &t);
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for (int k=1;k<=t;k++)
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{
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double ax, ay, bx, by, cx, cy;
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scanf("%lf%lf%lf%lf%lf%lf", &ax, &ay, &bx, &by, &cx, &cy);
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double t1 = (ax - bx) * (ax - bx) + (ay - by) * (ay - by);
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double ab = sqrt(t1);
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double t2 = (bx - cx) * (bx - cx) + (by - cy) * (by - cy);
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double bc = sqrt(t2);
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double h = sqrt(t1 - t2/4);
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double angle = acos(bc/(2.0*ab));
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double d = bc / sin(angle);
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double ans = 0;
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ans = d * angle;
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ans = ans + h;
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printf("Case #%d: %.4f\n", k, ans);
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}
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return 0;
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}
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