Perimeters, circles and arc lengths

What this note covers

1. Converting units of length
2. Finding perimeters of polygons and composites
3. Circumference and circular boundaries
4. Calculating arc length
5. Composite perimeters with arcs
6. Precision, reasonableness and exam communication
7. Worked boundary: a stadium-shaped exercise track
8. Worked sector and composite edging: angles, units and precision

8 sections · 10 key terms & formulas · 6 common mistakes