20/10/31 23:01:55.52 Ko+WsKhL.net
>>450
a=3 b=4 c=5
# l
(a*sqrt(a^2 - b^2 + c^2) + b*c)/sqrt(a^2 + c^2)
# m
(c*sqrt(a^2 - b^2 + c^2) + a*b)/sqrt(a^2 + c^2)
# Area
b*sqrt(a^2 - b^2 + c^2) + a*c
検算
> (a*sqrt(a^2 - b^2 + c^2) + b*c)/sqrt(a^2 + c^2)
[1] 5.612792
> # m
> (c*sqrt(a^2 - b^2 + c^2) + a*b)/sqrt(a^2 + c^2)
[1] 5.696017
> # Area
> b*sqrt(a^2 - b^2 + c^2) + a*c # Area
[1] 31.97056
>448の値と一致