Measurement.
Measurement: choosing units and instruments, accuracy and precision, unit conversions.
Work through the topic
Learn the method, follow the examples, then try the worksheet.
- 01
Choosing units and instruments
Select units and an instrument suited to the quantity, range and resolution needed.
- 02
Accuracy and precision
Distinguish resolution, accuracy and repeatability, then describe rounding intervals.
- 03
Unit conversions
Convert lengths, areas, volumes and capacities with the correct conversion factor.
- 04
Perimeter and composite area
Calculate perimeter and area by identifying boundaries and decomposing composite regions.
- 05
Surface area
Use the required faces and a net to calculate exposed surface area.
- 06
Volume and capacity
Calculate prism and cylinder volume, then interpret capacity and filling fractions.
- 07
Practical measurement models
Form a practical measurement model, apply allowances and make a justified purchase decision.
- 08
Scale drawings
Relate drawing and real dimensions using linear, area and volume scale factors.
- 09
Rates and compound units
Interpret rates and convert compound units by tracking the numerator and denominator.
- 10
Checking measurement results
Check units, size, precision and practical constraints before accepting a result.
Topic review
Revisit the key ideas, then choose a practice paper.