6 ft.

12 ft.

8 ft.

The area of this irregular

figure is

-sq. ft.

16 ft.

When we know all 3 sides, we use Heron's Formula

area = sqrt [s * (s-a) * (s-b) * (s-c) ]

where "s" is the semi-perimeter which in this case equals

s = (6 + 8 + 12) / 2 = 13

area = sqrt [13 * 5 * 7 * 1]

area = sqrt 455

area = 21.3307290077

area = 21.33 square feet (rounded)