Here is a scale drawing of a playground. The scale is 1 cm to 3 m.

A slide is going to be placed in the playground. The slide must be closer to CD CD\,CD than ADADAD. The slide must be less than 15 m from BBB.
Shade the region where the slide 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.