CIRCLE OR PIE GRAPHS

Concepts

accuracy

amount

angle

arc

area

content

data

data bias

degrees

diameter

graph

greater than/less than

increase/decrease

percentages

proportion

proportional parts

protractor

radius

sample

space

title

Skills

To relate the title to the contents of the graph.

To be able to multiply numbers with several place values.

To be able to divide numbers with multiple place values.

To read percentages on a circle graph.

To be able to interpret information on a circle graph.

To be able to compare information on a circle graph with other sources.

To be able to draw inferences from information on a circle graph.

To be able to create circle graphs related to a hypothesis.

To use the 360 degrees of a circle when calculating the size of portions of a graph.

To use division to calculate the percent of the 360 degrees of a circle which should be allotted to each portion of a circle graph.

To be able to measure with a protractor.

To be able to draw with a protractor.

HOW IS TIME SPENT IN ONE DAY?

(One day = 24 hours x 60 minutes in an hour = 1440 minutes)

Amount of Time Spent Doing Various Activities

Eating - 1 hour

Sleeping - 8 hours

Driving - 1 hour

Personal needs - 1 hour

Studying or attending classes - 10 hours

Recreation - 1 hour

Working at a job - 2 hours

Activity

TRY DRAWING A CIRCLE GRAPH USING THIS INFORMATION.

Eating - 60 ÷ 1440 = 4.16%

.0416 x 360 = 14.9 degrees

15 degrees

Sleeping - 480 ÷ 1440 = 33.3%

.333 x 360 = 119.9 degrees

120 degrees

Driving - 60 ÷ 1440 = 4.16%

.0416 x 360 = 14.9 degrees

15 degrees

Personal Needs - 60 ÷ 1440 = 4.16%

.0416 x 360 = 14.9 degrees

15 degrees

Studying or attending classes - 600 ÷ 1440 = 41.6% .416 x 360 = 149.7 degrees 150 degrees

Recreation - 60 ÷ 1440 = 4.16 %

.0416 x 360 = 14.9 degrees

15 degrees

 

Working at a job - 120 ÷ 1440 = 8.3%

.083 x 360 = 29.8 degrees

30 degrees


Material for the Inside of the Folder

• Material from social studies for mathematics textbooks that gives ideas for teaching about graphs.

• Graphs from textbooks, magazines, newspapers, or other literature.

• Ideas from the Internet for teaching about graphs.

• Statistical information that can be used to teach graphs.

• Pictures that show various quantities of objects that can be placed on a graph.

• Graph paper.

• Pictures of tools that can be used to build graphs. (Rulers, protractors, etc.)

• Information about computer programs that help construct graphs.


Written by Dr. Loretta Kuse and Dr. Hildegard Kuse