x

Spotting the clues

Composite figure showing a radius perpendicular to a tangent, a centre angle twice a matching circumference angle, opposite angles in a cyclic quadrilateral summing to 180 degrees, and the alternate segment theorem

Circle theorems help you turn a picture into facts about angles and lengths. Most questions become easier once you label the centre, tangents, chords, and any equal radii.

Circle Theorems Lesson

IGCSE
Maths
Circle Theorems

Step-by-step lessons covering Edexcel IGCSE Maths Circle Theorems for IGCSE Maths. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

Lessons

x

Spotting the clues

Composite figure showing a radius perpendicular to a tangent, a centre angle twice a matching circumference angle, opposite angles in a cyclic quadrilateral summing to 180 degrees, and the alternate segment theorem

Circle theorems help you turn a picture into facts about angles and lengths. Most questions become easier once you label the centre, tangents, chords, and any equal radii.

Circle Theorems Lesson

IGCSE
Maths
Circle Theorems

Step-by-step lessons covering Edexcel IGCSE Maths Circle Theorems for IGCSE Maths. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.