CIRCLES

OVERVIEW

Circles are explored in depth in this unit. From area of sectors to arc length and angle properties, circles and their properties are taught this half term. This is then extended to allow students to work out volume and surface area of shapes including cones, spheres and hemi-spheres. Higher tier students also learn how a circle can be represented on the cartesian plane. 

The previous lessons for this half term can be found here.

Lesson Resources

Lesson 1 – The parts of a circle (Recap from Year 8 Sum 1)

Lesson 2 – Circumference of a circle problems

Lesson 3 – Arc Length of a sector

Lesson 4 – Area of a circle problems (Recap from Year 8 Sum 1)

Lesson 5 – Area of a sector (Needs updating)

Lesson 6 – Volume of a cylinder (Recap from Year 9 Aut 2)

Lesson 7 – Volume of a cone using Pythagoras (Needs creating)

Lesson 8 – Volume of a sphere (Recap from Year 9 Aut 2)

Lesson 9 – Surface area of a cylinder (Recap from Year 9 Aut 2)

Lesson 10 – Surface area of spheres and cones (Needs creating)

Lesson 11 – Surface area problems (Higher) (Needs creating)

Lesson 12 – Circle Theorems 1 (Higher)

Lesson 13 – Circle Theorems 2 (Higher)

Lesson 14 – Circle Theorems 3 (Higher)

Lesson 15 – The equation of a circle (Higher) (Needs updating)

Lesson 16 – The equation of a tangent to a circle (Higher) (Needs updating)

Lesson 17 – Finding where a line intersects a circle (Higher)

Check Point