Inches is shown by two apostrophes (").
One, example 5'2" equals five feet and two inches.
The symbol for feet is one apostrophe, as in 15 feet = 15' The symbol for inches is two apostrophes, as in 15 inches = 15"
"Feet" has no apostrophes.
Plurals don't use apostrophes, so the first one is correct.
One foot = 12 inches, so two feet = 24 inches.
One, example 5'2" equals five feet and two inches.
The symbol for feet is one apostrophe, as in 15 feet = 15' The symbol for inches is two apostrophes, as in 15 inches = 15"
The inch sign is two prime symbols (″), while the foot sign is one (′). In ordinary typing, single and double quotation marks or apostrophes may be substituted.
"Feet" has no apostrophes.
2 apostrophes mean inches, and one means feet. 6'5" means six feet and 5 inches
Plurals don't use apostrophes, so the first one is correct.
You don't. Apostrophes aren't use to make words plural. The plural of person is people. (One person, two people.) You don't need the apostrophe in apostrophes either.
The two types of apostrophes are the straight apostrophe ('), which is used to show possession or contraction, and the curly or typographic apostrophe (’), which is a more visually appealing version of the straight apostrophe.
Apostrophe has only one name. It's apostrophe. The plural is apostrophes.
One foot and ten inches
No words are contracted into apostrophes.
2 1/4 inches = 2.25 inches are 57.15 millimeters.