A ruler.
What measure of units would you use to measure the thickness of a phone book
You would typically use inches to measure a paperback book. You can measure the length, width, and thickness of the book in inches to determine its size.
To find the area of a book cover in metric units, the most appropriate unit to use would be centimeters. The formula for finding the area of a book cover would be: length x width.
Use a ruler.
Millimetres
meter
A ruler
Millimeters or centimeters.
meters2
one page of a phonebook is measured in mm. unit thickness of a phone book is cm
To use inches to measure a math book would make more sense, but feet does too, since a math book's length on the binding side is close to a foot. Inches makes the most sense though.
inches because there small enough