Answer:
32+16√3 mm²
Step-by-step explanation:
Refer to pic attached: CD perpendicular and bisect AB at midpoint C, CD = ∨BD²-BC² = √12 = 2√3
FG = 2*4 = 8
GH = 2 + 2√3 + 2 = 4 + 2√3
area FGHI = 8 * (4 + 2√3) = 32 + 16√3 ...answer
