Students learn how to discover various angle properties such as angles on a straight line, about a point, in a triangle and on parallel lines. As learning progress they are challenged to construct polygons and solve problems involving their interior and exterior angles. Angle properties is studied in Term 4, Year 9 of the Higher GCSE course and is prerequisite knowledge for circle theorems.
How to introduce the sin, cos and tan trigonometric identities.
How to teach calculating the original amount after a percentage change.
The importance of the range when comparing comparing datasets.