MA28-02 Maths Coming soon
Finding the mirror line from a shape and its image
MA28-02
This lesson is coming soon.
In this lesson
Given a shape and its reflected image, construct and state the equation of the mirror line (e.g. x = a, y = b, y = x).
What it covers
- Locating the mirror line by joining a vertex to its image and finding the perpendicular midpoint
- Stating the mirror line in the form x=a, y=b, or y=x/y=-x
- Writing 'reflection' plus the correct line as a complete two-part formal description
Key words
For: Edexcel IGCSE 4MA1, OCR GCSE J560, Cambridge IGCSE 0580, AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300
On the specification
| Board | Spec | Statement |
|---|---|---|
| Edexcel IGCSE 4MA1 | F5.2D | Understand that reflections are specified by a mirror line |
| Edexcel IGCSE 4MA1 | F5.2E | Construct a mirror line given an object and reflect a shape given a mirror line |
| OCR GCSE J560 | 9.01a | Reflect a simple shape in a given mirror line, and identify the mirror line from a shape and its image. |
| Cambridge IGCSE 0580 | C7.1 | Transformations |
| Cambridge IGCSE 0580 | E7.1 | Transformations |
| AQA GCSE 8300 | G7 | Identify, describe and construct congruent and similar shapes, including on coordinate axes, by considering rotation, reflection, translation and enlargement |
| Edexcel GCSE 1MA1 | G7 | Identify, describe and construct congruent and similar shapes, including on coordinate axes, by considering rotation, reflection, translation and enlargement (including fractional scale factors) |
| Eduqas GCSE C300 | FG7 | Identify, describe and construct congruent and similar shapes, including on coordinate axes, by considering rotation, reflection, translation and enlargement (including fractional scale factors) |
| Eduqas GCSE C300 | HG7 | Identify, describe and construct congruent and similar shapes, including on coordinate axes, by considering rotation, reflection, translation and enlargement (including fractional and negative scale factors) |
For teachers
This GCSE Maths lesson teaches finding the mirror line from a shape and its image. By the end, students should be able to given a shape and its reflected image, construct and state the equation of the mirror line (e.g. x = a, y = b, y = x). It works through two worked examples and the mistakes examiners report.