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 AB AB\,AB than ADADAD.
The slide must be less than 15 m from CCC.
Shade the region where the slide can be placed.

134 exam-style questions on Edexcel GCSE Maths Loci and Construction. Each one has a worked solution and a mark scheme showing where the marks go.