Question 1193846
Draw this
AB is 16 sqrt(3), the hypotenuse.
In this 30-60-90 rt triangle, AC is therefore 8 sqrt(3), half the hypotenuse.
That makes BC 16
so BD is 8
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Also, triangle ACD has a 30 degree angle with adjacent side 8 sqrt(3). That makes the opposite side 8 sqrt(3)/sqrt(3) or 8.