## Software/Applets used on this page

## Glossary

### union

The union of two sets A and B is the set containing all the elements of A and B.

## This question appears in the following syllabi:

Syllabus | Module | Section | Topic | Exam Year |
---|---|---|---|---|

GCSE Foundation (UK) | Geometry | Perimeter area volume | Triangles and rectangles | - |

Universal (all site questions) | P | Perimeter area volume | Triangles and rectangles | - |

CBSE X (India) | Coordinate Geometry | Lines | Area of a triangle | - |

CBSE IX (India) | Mensuration | Areas | Triangles - Heron's formula | - |

Edexcel GCSE (9-1) Foundation (UK) | G: Mensuration and Calculation | G16: Areas and Volumes of Basic Shapes | Triangles and Rectangles | - |

OCR GCSE (9-1) Foundation (UK) | 10: Mensuration | 10.03a: Area of a Triangle | Triangles and Rectangles | - |

AQA GCSE (9-1) Foundation (UK) | G: Mensuration and Calculation | G16: Areas and Volumes of Basic Shapes | Triangles and Rectangles | - |

CIE IGCSE (9-1) Maths (0626 UK) | 4 Mensuration | C4.2 Perimeters and Areas of 2D Shapes | Triangles and Rectangles | - |