Construct it

The constructions this book asks for, with a ruler, a compass and a sharp pencil. Pick a set of values, construct it on paper one step at a time, and check each step against the drawing. Every drawing is at true size.

Angles with a protractor Any angle: the protractor on the base line, a mark at the reading Unit 1 · Lines and Angles
Perpendicular and parallel lines on squared paper Count the squares: across and up for a parallel, turned round for a perpendicular Unit 1 · Lines and Angles