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A195448 Decimal expansion of shortest length, (C), of segment from side CA through centroid to side CB in right triangle ABC with sidelengths (a,b,c)=(1,3,sqrt(10)).

%I A195448 #5 Mar 30 2012 18:57:45
%S A195448 1,5,6,3,1,9,1,0,3,6,6,7,5,6,7,7,4,9,2,4,7,0,0,3,6,7,4,1,2,9,7,1,4,5,
%T A195448 4,0,4,7,4,4,9,8,0,7,0,3,8,3,7,4,3,2,0,7,6,5,2,1,0,8,7,5,3,3,7,0,4,0,
%U A195448 4,6,2,7,2,9,1,3,4,7,9,3,3,8,8,2,5,8,0,1,4,2,1,0,5,6,0,3,3,8,4,1
%N A195448 Decimal expansion of shortest length, (C), of segment from side CA through centroid to side CB in right triangle ABC with sidelengths (a,b,c)=(1,3,sqrt(10)).
%C A195448 See A195304 for definitions and a general discussion.
%e A195448 (C)=1.563191036675677492470036741297145404744...
%t A195448 a = 1; b = 3; h = 2 a/3; k = b/3;
%t A195448 f[t_] := (t - a)^2 + ((t - a)^2) ((a*k - b*t)/(a*h - a*t))^2
%t A195448 s = NSolve[D[f[t], t] == 0, t, 150]
%t A195448 f1 = (f[t])^(1/2) /. Part[s, 4]
%t A195448 RealDigits[%, 10, 100] (* (A) A195446  *)
%t A195448 f[t_] := (t - a)^2 + ((t - a)^2) (k/(h - t))^2
%t A195448 s = NSolve[D[f[t], t] == 0, t, 150]
%t A195448 f2 = (f[t])^(1/2) /. Part[s, 4]
%t A195448 RealDigits[%, 10, 100] (* (B) A195447 *)
%t A195448 f[t_] := (b*t/a)^2 + ((b*t/a)^2) ((a*h - a*t)/(b*t - a*k))^2
%t A195448 s = NSolve[D[f[t], t] == 0, t, 150]
%t A195448 f3 = (f[t])^(1/2) /. Part[s, 1]
%t A195448 RealDigits[%, 10, 100] (* (C) A195448 *)
%t A195448 c = Sqrt[a^2 + b^2]; (f1 + f2 + f3)/(a + b + c)
%t A195448 RealDigits[%, 10, 100] (* Philo(ABC,G) A195449 *)
%Y A195448 Cf. A195304.
%K A195448 nonn,cons
%O A195448 1,2
%A A195448 _Clark Kimberling_, Sep 18 2011