Answer:
6
Explanation:
The triangle is a 30-60-90 triangle, which is a special kind of triangle whose side lengths can be found by memorizing a chart that I attached. Since the long leg is 6 sqrt3, you just realize that q is the short leg, so it would just be 6.
Also I'm sorry the chart didn't come through right, but if you search "30-60-90 chart", it'll come up.