Question

a dimension is a measurement written as a _______. range letter symbol number

Explanation:

A dimension is a measurement. Measurements are typically represented numerically. For example, length can be 5 meters (where 5 is a number), area can be 10 square - feet (10 is a number). A range is a set of values (e.g., 1 - 5), a letter (like 'a', 'b') and a symbol (like '+', '-') do not represent a measurement in the context of what a dimension is.

Answer:

number