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 ...

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").