# Maths KS3: Measurement

Sanjeev Kohli has bought a new outfit but the trousers and jacket don't fit.

He visits Elle Wilson, a seamstress, for alterations and finds that measurements are vital to the process.

He then commissions a hat to be made by a milliner, Pea Cooper.

This involves measurement and working out the circumference of a circle.

The milliner calculates the time she needs to make the hat because this will affect the price she charges.

This clip is from the BBC series Who Needs Maths?

### Teacher Notes

This could encourage a general discussion about the importance of accurate measurement.

Ask the students to practice calculating the circumference, radius and diameter of a circle.

Students could do their own measuring of objects around the classroom or school, then work out the maths to alter them to a different size, either bigger or smaller.

For example, they could measure a playground bench, then calculate how much would need to be sawn off to get it through a classroom door, or how big the classroom and furniture would have to be if all the students grew or shrank by a certain amount.

### Curriculum Notes

This clip is relevant for teaching maths at Key Stage 3 and Third/Fourth Level in Scotland.