MA26-02 Maths Coming soon
Properties of special quadrilaterals and triangles
MA26-02
This lesson is coming soon.
In this lesson
Apply the side and angle properties of special quadrilaterals and triangles to find missing lengths and angles, always justifying that a property actually applies before using it.
What it covers
- Side and angle properties of square, rectangle, parallelogram, trapezium, kite, rhombus
- Side and angle properties of isosceles, equilateral, scalene and right-angled triangles
- Using a named property as a justified step to find an unknown length or angle
- The 'don't assume it, prove it' trap: using a property (e.g. parallel sides) without establishing it applies
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, Edexcel IGCSE 4MA1, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | G4 | Derive and apply the properties and definitions of: special types of quadrilaterals, including square, rectangle, parallelogram, trapezium, kite and rhombus |
| Edexcel GCSE 1MA1 | G4 | Derive and apply the properties and definitions of special types of quadrilaterals, including square, rectangle, parallelogram, trapezium, kite and rhombus; and triangles and other plane figures using appropriate language |
| Eduqas GCSE C300 | FG4 | Derive and apply the properties and definitions of: special types of triangles, quadrilaterals (including square, rectangle, parallelogram, trapezium, kite and rhombus) and other plane figures using appropriate language |
| Eduqas GCSE C300 | HG4 | Derive and apply the properties and definitions of: special types of triangles, quadrilaterals (including square, rectangle, parallelogram, trapezium, kite and rhombus) and other plane figures using appropriate language |
| Edexcel IGCSE 4MA1 | F4.1D | Understand the terms 'isosceles', 'equilateral' and 'right-angled triangles' and the angle properties of these triangles |
| Edexcel IGCSE 4MA1 | F4.2C | Understand and use the properties of the parallelogram, rectangle, square, rhombus, trapezium and kite |
| OCR GCSE J560 | 8.04a | Know the basic properties of isosceles, equilateral and right-angled triangles. Give geometrical reasons to justify these properties. |
| OCR GCSE J560 | 8.04b | Know the basic properties of the square, rectangle, parallelogram, trapezium, kite and rhombus. Give geometrical reasons to justify these properties. |
For teachers
This GCSE Maths lesson teaches properties of special quadrilaterals and triangles. By the end, students should be able to apply the side and angle properties of special quadrilaterals and triangles to find missing lengths and angles, always justifying that a property actually applies before using it. It works through two worked examples and the mistakes examiners report.