# Key Stage 4, Express Maths

Parts of a circle 1 & 2

## Lessons in this unit

Lesson 1

## Know the parts of a circle

Lesson 2

## Find the area of a semicircle and quarter circle

Lesson 3

## Find the area of a sector

Lesson 4

## Find the radius or diameter given the area of a sector

Lesson 5

## Find the length of an arc on a semicircle and quarter circle and the perimeter of a semicircle and quarter circle

Lesson 6

## Find the length of an arc and the perimeter of a sector

Lesson 7

## Use the arc length to find the radius or angle of a sector

Lesson 8