**This resource uses dynamic geometry software to investigate the geometric properties of a Penny-Farthing.**The associated worksheet asks questions regarding circumference, scale factors and arcs and touches on the tangent-radius property.

Objectives covered for Years 9 to 11:

- Know and use the formulae for the circumference and area of a circle
- Solve problems involving lengths of circular arcs and areas of sectors
- Understand and use the formulae for the length of a circular arc and area and perimeter of a sector
- Use ICT to explore constructions
- Interpret and use ratio in a range of contexts

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