Area and Perimeter of Sectors Lesson Slides: 7 Slides

7 Slides • 8 Questions

1

Area and Perimeter of a sector

Chapter 12.4

2

3

4

5

6

Multiple Choice

Which of the following shows the correct working out when finding the AREA of the SECTOR shown in the diagram?

1

$\frac{75}{360}\times\left(\pi\times8\right)$

2

$\frac{75}{360}\times\left(\pi\times8^2\right)$

3

$\frac{75}{360}\times2\times\pi\times8$

4

$\frac{75}{360}\times\left(2\times\pi\times8^2\right)$

7

Multiple Choice

Calculate the area

1

$3cm$

2

$3.44cm^2$

3

$2.6cm^2$

4

$4cm^2$

8

Multiple Choice

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Give your answer to two decimal places.

1

5.24

2

10.47

3

3.142

4

40π

9

Multiple Choice

What is the area of the shaded region? Round to the nearest hundredth.

1

1.26

2

452.39

3

9.42

4

113.10

10

Multiple Select

If Pacman's mouth, when open, is 70° and the radius of his mouth is 8mm, what is the area of the rest of Pacman's body? Give your answer to two decimal places.

1

161.97mm²

2

39.10mm²

3

40.49mm²

4

9.77mm²

11

12

13

Multiple Choice

Which of the following shows the correct working out when finding the ARC LENGTH of the sector shown in the diagram?

1

$\frac{45}{360}\times\left(2\times12\right)$

2

$\frac{45}{360}\times\left(2\times\pi\times12\right)$

3

$45\times2\times\pi\times12$

4

$\frac{360}{45}\times\left(2\times\pi\times12\right)$

14

Multiple Choice

What fraction of the circle is shaded, in its simplest form?

1

$\frac{90}{360}$

2

$\frac{100}{360}$

3

90

4

$\frac{1}{4}$

15

Multiple Choice

Find the perimeter of the sector

1

9.7cm

2

5cm

3

6.4cm

4

10.1cm

Area and Perimeter of a sector

Chapter 12.4

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