This excel file shows the Greenwich Meridian, lines of longitude and parallels of latitude. It treats the Earth as a sphere. On the interactive sheets the position of two points on the globe can be altered.

There is a...

The first two sheets of this excel file remind students of terminology associated with circles and the formulae for area and circumference of a circle. The next five sheets deal with finding the arc length as a fraction of the circumference with worked examples of the...