# Circle Theorems; Geometrical Proof (Higher - Unit 3)

 Topic: Circle Theorems; Geometrical Proof Estimated teaching time: Higher 2.5 hours - 3.5 hours

## Specification references (in recommended teaching order)

 G1.5h Distinguish between centre, radius, chord, diameter, circumference, tangent, arc, sector and segment. Know and use circle theorems. View assessment guidance > G1.1 Recall and use properties of angles at a point, angles at a point on a straight line (including right angles), perpendicular lines and opposite angles at a vertex.View assessment guidance > G1.2 Understand and use the angle properties of parallel and intersecting lines, triangles and quadrilaterals.View assessment guidance > G1.3 Calculate and use the sums of the interior and exterior angles of polygonsView assessment guidance > G1.8h Understand congruence and similarity. Use similarity. Understand and use conditions for congruent triangles.View assessment guidance > G2.3 Justify simple geometrical properties. Simple geometrical proofs.View assessment guidance >

## Teaching resources

 Launch Exampro > Exam questions and revision materials.

Please note that, due to the overlap of C/D questions, some material may have been tagged as appropriate for both Foundation and Higher tier. Equally, due to the nature of some questions, different parts of a question may assess different topics. Teachers are advised to ensure learners have covered all of the question content before using such questions.