# Area of sectors

## Lesson details

### Key learning points

1. In this lesson, we will learn how to find the areas of sectors using a radius or diameter.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
What is the area of a circle with radius 5cm to 1d.p?
15.7
246.7
31.4
Q2.
What is the circumference of a circle with radius 8cm to 1d.p?
201.1
25.1
Q3.
What is the diameter of a circle with a circumference 40m?
3.2
6.3
6.4
Q4.
The area of a circle is 25 cm squared. What is the diameter
2.8 cm
3.2cm
8.0cm
Q5.
The area of a circle is 144 pi. What is the circumference?
12pi
5184pi
6pi

## Exit quiz

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### 5 Questions

Q1.
If the circumference of a circle is 12pi, what is the area?
144pi
36pi
6pi
Q2.
What is the area of this sector?
100pi
25pi
5pi
Q3.
What is the area of this sector to 1 decimal place?
113.1
28.3
Q4.
What is the area of this sector to 1 decimal place?
324.2
7.1
81.1
Q5.
What is the area of this sector to 1 decimal place?
24.1