Скачать или смотреть Circle Theorems: Angle at the Centre is Twice the Angle at the Circumference 📐 | Maths Tutorial

Welcome to the next lesson in my Circle Theorems series! Today, I am breaking down one of the most fundamental rules you will encounter in your geometry exams: The angle subtended by an arc at the centre is double the angle subtended by the same arc at the circumference.

Often recognised by its classic 'arrowhead' or 'Star Trek' shape, this theorem is an essential building block for solving complex circle geometry problems. In this tutorial, I will guide you through how to identify this relationship, even when examiners try to disguise it in confusing diagrams!

📌 In this video, I will cover:

1. A clear, step-by-step breakdown of the "angle at the centre" theorem.

2. How to spot the classic "arrowhead" shape in an exam question.

3. Variations of the diagram, including when the lines cross over or when dealing with reflex angles.

Worked examples of past exam questions to help you practise and build confidence.

This lesson is specifically designed for students studying for their Cambridge IGCSE, O Level, and ZIMSEC maths examinations. Grab your pen, paper, and geometry set, and let's master this theorem together!

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