MA27-11 Maths Coming soon
Giving informal reasons for geometry results
MA27-11
This lesson is coming soon.
In this lesson
Give correctly-worded informal reasons when arriving at numerical answers for lines, chords, tangents, triangles or polygons, using the exact keywords examiners require.
What it covers
- Giving a correctly-worded informal reason for lines, chords, tangents, triangles or polygon results
- Spotting near-miss wording that swaps in the wrong keyword for a superficially similar reason
Key words
For: Edexcel IGCSE 4MA1
On the specification
| Board | Spec | Statement |
|---|---|---|
| Edexcel IGCSE 4MA1 | F4.7A | Give informal reasons, where required, when arriving at numerical solutions to geometrical problems |
For teachers
This GCSE Maths lesson teaches giving informal reasons for geometry results. By the end, students should be able to give correctly-worded informal reasons when arriving at numerical answers for lines, chords, tangents, triangles or polygons, using the exact keywords examiners require. It works through two worked examples and the mistakes examiners report.