A KS3 Bitesize 11-14 Maths guide showing how to use right angle triangles to solve geometry problems. ... WHAT YOU NEED: paper, ruler, compass, pencil, pens and scissors. Image caption, ...

“Instead of a flat ruler, this one is angled at a 30° slope. You can read the measurements from a glance without having to lean over (improving your already questionable posture).