One of the answers is wrong in the display below. Can you find it? And can you give the correct answer?

## 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 |
---|---|---|---|---|

AQA AS Maths 2017 | Pure Maths | Straight Lines and Circles | Circle Theorems | - |

AQA AS/A2 Maths 2017 | Pure Maths | Straight Lines and Circles | Circle Theorems | - |

AQA GCSE (9-1) Higher (UK) | G: Properties and Constructions | G10: Circle Theorems | Spot the Mistake - Circle Theorems | - |

CBSE X (India) | Geometry | Circles | Tangent perpendicular to radius | - |

CIE IGCSE (9-1) Maths (0626 UK) | 3 Geometry | B3.7 Calculating Unknown Angles | Spot the Mistake - Circle Theorems | - |

Edexcel AS Maths 2017 | Pure Maths | Circles | Circle Theorems | - |

Edexcel AS/A2 Maths 2017 | Pure Maths | Circles | Circle Theorems | - |

Edexcel GCSE (9-1) Higher (UK) | G: Properties and Constructions | G10: Circle Theorems | Spot the Mistake - Circle Theorems | - |

GCSE Higher (UK) | Geometry | Circles | Spot the mistake | - |

OCR AS Maths 2017 | Pure Maths | Lines and Circles | Circle Theorems | - |

OCR GCSE (9-1) Higher (UK) | 8: Basic Geometry | 8.05: Circle Theorems | Spot the Mistake - Circle Theorems | - |

OCR MEI AS Maths 2017 | Pure Maths | Lines and Circles | Circle Theorems | - |

Universal (all site questions) | C | Circles | Spot the mistake | - |