I have often had to look up formulas for area and volume, or combinations and permutations. Or what the letters in the Greek alphabet are, or math prefixes (such as "nano").

In this lesson, Mrs. Brewer introduces the concept of volume to the students.

In the same math textbook, Allen talks about the formula for right circular cylinder , which is used to measure volume (145). And you use that formula to measure the volume of the hockey puck ...