Arc Length and Area of Sectors
To be able to:
 Calculate the length of an arc
 Calculate the area of a sector
What is the circumference and area of the circle below (5m is the radius)?
Useful Formulae
A sector is a proportion of
a circle (think of a pizza
slice)
An arc is a proportion of the
circumference
Arc Length
Arc Length =  x πd
360
Example 1
Example 2
Area of Sector
Example 1
Example 2
Exercise 1
Arcs
Area of a Sector
Challenge