The answer that is shown in Fig. 1, where
the curved wall shuts out the cottages from access to the
lake is a possibility.
But in seeking the direction for the "shortest possible" wall most
readers to-day, remembering that the shortest distance between two
points is a straight line, will adopt the method shown in Fig. 2.
is certainly an improvement, yet the correct answer is really that
indicated in Fig. 3.
A measurement of the lines will show that there is
a considerable saving of length in this wall.