Brian just bought a used sailboat,
but it needs a new triangular sail.
The dimensions of the sail are
11 feet \times 12 feet \times 7 feet.
a. What are the measures of the three
angles of the sail?
b. How much fabric would a sail of
this size require?
c. Suppose he plans to make the
sail three different colors by
dividing the largest angle so
the 12-foot side is split into
three sections of 5 feet (blue),
4 feet (yellow), and 3 feet (red),
respectively. How much fabric of
each color would he need?