Students learn how work out missing angles in a triangle and on a straight line.

As learning progresses the combine multiple angle properties within a bigger problem.

**Differentiated Learning Objectives**

- All students should be able to calculate the remaining angle in a scalene and right angled triangle when given the two.
- Most students should be able to use the properties of triangles to calculate angles in isosceles and equilateral triangles when given one.
- Some students should be able to calculate angles in compound shapes involving multiple types of triangle.