We usually measure distance as the crow flies. These problems explore the mathematics that emerges when we express distance in different ways, using ideas from taxi-cab geometry.

How do you measure the distance between two points? A straight line? The shortest route by road? The time it takes to travel? Find out different ways of measuring distance and the mathematical idea of a metric.

To get around a city, we can't walk as the crow flies, but instead we have to walk up, down and across the blocks. What can you discover about taxi-cab geometry?