# 2.3 Calculate the area of a circle and parts of a circle with a calculator

Calculate the area of a circle and parts of circle
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MathematicsLower Secondary (Key Stage 3)

This lesson contains 25 slides, with interactive quizzes, text slides and 3 videos.

Lesson duration is: 60 min

## Items in this lesson

Calculate the area of a circle and parts of circle

#### Slide 1 -Slide

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0:30
Which part of the circle are we talking about when we use the term 'circumference'?

#### Slide 2 -Mind map

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#### Slide 3 -Slide

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1:00
Which part of the circle are we talking about when we use the term 'radius'?

#### Slide 4 -Mind map

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#### Slide 5 -Slide

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Which part of the circle are we talking about when we use the term 'centre'?

#### Slide 6 -Mind map

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#### Slide 7 -Slide

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Which part of the circle are we talking about when we use the term 'diameter'?

#### Slide 8 -Mind map

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#### Slide 9 -Slide

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What is the diameter of a circle if its radius is 6cm?
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0:15
A
3cm
B
12cm
C
10cm
D
12mm

#### Slide 10 -Quiz

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What is the radius of a circle if the diameter is 16m
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1:00
A
16cm
B
3m
C
8m
D
8cm

#### Slide 11 -Quiz

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What is the circumference of a circle with a radius of 3cm?
(Remember C=2πr, where π=3.14)
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1:00
A
16.85cm
B
19.85cm
C
17.85cm
D
18.85cm

#### Slide 12 -Quiz

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What is the circumference of a circle with a diameter of 10cm?
(Remember C=2πr, where π=3.14)
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1:00
A
30.42cm
B
31.42cm
C
32.42cm
D
33.42cm

#### Slide 13 -Quiz

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#### Slide 14 -Video

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2.3 Calculate the area of a circle and parts of a circle with a calculator

#### Slide 15 -Slide

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1:00
What is a 'sector' of a circle?

#### Slide 16 -Mind map

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#### Slide 17 -Slide

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#### Slide 18 -Video

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Write down 3 things you learned in this lesson.

#### Slide 20 -Open question

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.
Write down 2 things you want to know more about.

#### Slide 21 -Open question

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

#### Slide 22 -Open question

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.
Partial circle area and arc length
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3:00

#### Slide 23 -Slide

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#### Slide 24 -Slide

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#### Slide 25 -Video

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