Answer: 13.5 ft². Explanation: A parallelogram is bisected by its diagonal so the area is also bisected. A bisected figure is exactly half of the measurement of the original figure.
Half of 27 square feet is 13.5 square feet.The formula for finding area of a triangle is: A = [tex] \frac{1}{2} [/tex]bh (formula for area of a parallelogram. A=bh).