Grade 4 - Progress in Mathematics

Update your skills. See pages 13 and 26.

Circle Graphs

7-5

A circle graph shows data

as parts of a whole.

This circle graph shows the

number of singers who were

selected for the Community Chorus.

Which group of singers makes up

one half of the chorus?

To find the group of singers that represents

one half of the chorus, look for the part of

the circle graph that is one half of the circle.

Sopranosis one half of the circle graph.

Sopranos make up one half of the chorus.

Which two groups of singers make up

one fourth of the chorus?

To find the two groups of singers that represent

one fourth of the chorus, find the two parts of the

circle graph that together are one fourth of the circle.

Bassesand Altostogether are one fourth of the

circle graph. Basses and altos make up one fourth

of the chorus.

How many singers make up the Community Chorus?

To find the number that is represented

by the whole graph, add the numbers

in the sections of the graph: 24 
 8 
 4 
 12  48

Forty-eight singers make up the Community Chorus.

Sopranos

Basses^24

4

Altos

8

Tenors

12

Community Chorus

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