A map is shown of an area with a ring road, and also a road running across the diameter of the ring road. Two routes are shown; one going around the circle, the second using a combination of arcs and going across the diameter. Which is the shorter path?
Additional photographs are given; one showing the diameter of the circle, on with just dots for the start and end points, and one with no route marked.
The answer is revealed in a video with animated dots, travelling at the same speed, making the two journeys. The route using a combination of arcs and the diameter is the fastest route.
Show health and safety information
Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.