MA27-10 Maths Coming soon

Circle theorem: intersecting chords (Higher)

MA27-10

This lesson is coming soon.

Watch now instead: MA32-01 Mean, median, mode and range

In this lesson

Understand and use the internal and external intersecting-chord properties of a circle to find an unknown length.

What it covers

The internal intersecting chord property (product of the two segments of one chord equals the product of the two segments of the other, when they cross inside the circle)
The external intersecting chord/secant property (from a point outside the circle)

Key words

intersecting-chords secant-segments

For: Edexcel IGCSE 4MA1

On the specification

Board	Spec	Statement
Edexcel IGCSE 4MA1	H4.6A	Understand and use the internal and external intersecting chord properties

For teachers

This GCSE Maths lesson teaches circle theorem: intersecting chords (Higher). By the end, students should be able to understand and use the internal and external intersecting-chord properties of a circle to find an unknown length. It works through two worked examples and the mistakes examiners report.