公布昨晚題目答案，非常感謝大家的參與！

總麵積： = 50
三角形各邊長：
A = 4.4721359549995787
B = 4.12310562561766
C = 3.6055512754639887

此題來自：
http://87.230.22.228/doc/tutorial.pdf
第一百頁～一百零一頁。
還有圖：Fig. 9.6

_(a) _(a) _(a)

===================原題：============================
Consider the following problem:

George is contemplating buying a farm which is a very strange shape, comprising a large triangular lake with a square field on each side. The area of the lake is exactly seven acres, and the area of each field is an exact whole number of acres. Given that information, what is the smallest possible total area of the three fields?