A farmer with an eye for the unusual has decided to build a pentagonal enclosure whose shape will be a rectangle with an equilateral triangle sitting on top of it. (See figure at right.) The perimeter is
Label all sides.
Find y in terms of
Find the area of the figure as a function of
To find the area of the triangle, drop an altitude forming two congruent triangles. The diagonal will be '
Use the Pythagorean Theorem to find the height. The area will be