Where Did The Word”Pi” Come From?Pi is the Latin name of the sixteenth Greek letter, π. But, where did it come from?
How To Use ColonsColons are used to introduce lists, quotes, or further explanation. They’re also used to separate items in non-grammatical structures. Introducing a List A colon can be used to introduce a list. In general, the portion of sentence before the colon should be a complete sentence (it should contain a subject and a verb). Phrases like the following may sometimes be used to signal an introduction …
Origin of aperture ratio
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019