Final answer:
A vehicle about to enter a roundabout has right-of-way over vehicles already in the circle.
Step-by-step explanation:
In a roundabout, a vehicle about to enter has right-of-way over vehicles already in the circle. Therefore, the statement 'A vehicle about to enter a roundabout has right-of-way over vehicles already in the circle' is true.
The statement that a vehicle about to enter a roundabout has right-of-way over vehicles already in the circle is false. In fact, the rules of the road typically give right-of-way to vehicles already circulating inside the roundabout.
This means that those entering the roundabout must yield and only enter when it is safe to do so, without interfering with the flow of traffic already inside the roundabout. It is important for all drivers to follow these rules to ensure safety and efficiency at roundabouts and intersections.