What is the value of x?
O
O
O
O
2 units
3 units
5 units
8 units
A
X
D

Answer:
D. 8 units
Step-by-step explanation:
Triangle ABD is a 30/60/90 degree triangle.
If one side is 10 and another is 8, that makes the common triangle proportions of 3, 4. 5 units. The third side would be 6 units.