int math 2 section 5-9 1011

Section 5-9Problem Solving Skills:

Circle Graphs

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Essential Question

• How do you accurately create circle graphs to describe real-world data?

• Where you’ll see this:

• Market research, food service, recreation

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Vocabulary

1. Circle Graph:

2. Sector:

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Vocabulary

1. Circle Graph: A visual representation of data where central angles are formed in a circle to show comparisons

2. Sector:

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Vocabulary

1. Circle Graph: A visual representation of data where central angles are formed in a circle to show comparisons

2. Sector: Each part of a circle graph

Wed, Feb 02

Example 1The following table shows what percentage of people list the following types of music as their

favorite. Make a circle graph for the data. Write a title for your graph.

TYPE OF MUSIC PERCENTAGEOldies 8Pop 26

Alternative 14Rock 20

Hip-hop 17Indie/College 9

Jazz 6Wed, Feb 02

Example 1

a. Find the number of degrees in each central angle.TYPE OF MUSIC

%

Oldies 8Pop 26



Jazz 6Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360°

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Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8°

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Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360°

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Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360°

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Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72° (.17)360°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72° (.17)360° = 61.2°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72° (.17)360° = 61.2° (.09)360°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72° (.17)360° = 61.2° (.09)360° = 32.4°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72° (.17)360° = 61.2° (.09)360° = 32.4° (.06)360°

Wed, Feb 02

Example 1


%

Oldies 8Pop 26



Jazz 6

(.08)360° = 28.8° (.26)360° = 93.6° (.14)360° = 50.4° (.20)360° = 72° (.17)360° = 61.2° (.09)360° = 32.4° (.06)360° = 21.6°

Wed, Feb 02

Example 1


% Degrees

Oldies 8Pop 26

Alternative

14Rock 20

Hip-hop 17Indie/

College9

Jazz 6

28.8° 93.6° 50.4° 72°

61.2° 32.4° 21.6°

Wed, Feb 02

Example 1b. Construct the central angles for each sector. You

need to start with a radius that you can put anywhere on the circle. Then measure each angle as you go around until you end up where you began.

Wed, Feb 02

Wed, Feb 02

8%

26%

14%

20%

17%

9%

6%

Favorite Type of Music

Jazz Indie/College Hip-Hop Rock AlternativePop Oldies

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6%

9%

17%

20%

14%

26%

8%

Favorite Type of Music

Jazz Indie/College Hip-Hop Rock AlternativePop Oldies

Wed, Feb 02

Problem Set

Wed, Feb 02

Problem Set

p. 233 #1-16 all

“Practice is a means of inviting the perfection desired.”- Martha Graham

Wed, Feb 02

int math 2 section 5-9 1011

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