Grade 10 Geometry

Grade 10 geometry is almost entirely about the circle, and about a set of theorems that are examined in combination rather than one at a time. A typical past-paper question presents a single figure in which three theorems apply, and the student has to notice which one to use at each step. Recognising that is a skill built by working through many figures, not by rereading the theorems.

Similarity is the other theme. Students learn to justify why two triangles are similar before using the ratio of their sides, because the marks are attached to the justification.

As in Grade 9, the presentation carries marks. We insist on the standard proof format and on clear, accurately drawn figures, since a badly drawn figure hides the very relationship the question is about.