Here is a scale drawing of a room. The scale is 1 cm to 2 m.

A chair is going to be placed in the room. The chair must be closer to AB AB\,AB than BCBCBC. The chair must be less than 14 m from DDD.
Shade the region where the chair can be placed.
134 exam-style questions on AQA GCSE Maths Loci and Construction. Each one has a worked solution and a mark scheme showing where the marks go.