Posted by **Delores** on Friday, July 30, 2010 at 3:20pm.

Hat sizes are determined by measuring the circumference of the head in either inches or centimeters?

use ratio and proportions to complete the following table

Hat size =7 Head circumference inches = 22 and Centimeters =56

and If hat size was 6 3/4 Head circumference in inches would = ? and in centimeters would = ?

- Math -
**Ms. Sue**, Friday, July 30, 2010 at 4:29pm
6 3/4 : x = 7 : 22

7x = 148.5

x = 21.21 inches

Go ahead and do the same thing for the circumference in centimeters -- remembering that the answer will be a little less than 56.

We'll be glad to check your answer.

- Math -
**Henry**, Friday, July 30, 2010 at 5:56pm
C / 6.75 = 22in / 7, C = 6.75*22/7 =21in

C / 6.75 = 56 / 7, C = 6.75*56/7 = 54cm

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