Using their knowledge of triangles students learn how to construct scale drawings of bearings. As learning progresses students move from constructing scale drawings of bearings to interpreting diagrams using ratio.

The start of the lesson recaps calculating angles in scalene and isosceles triangles. The plenary challenges students to apply additional construction techiniques such as bisectors to find the bearing between two towns.

**Differentiated Learning Objectives**

- All students should be able to use ASA to construct and interpret bearings and scale drawings.
- Most students should be able use ASA and SSS to construct and interpret bearings and scale drawings.
- Some students should be able to construct and interpret bearings and scale drawings.