What you have done in the question is perfectly good.
19.5 inches
66 inches
five feet six inches.
72 inches
There are 12 inches in a foot. Six feet would be 72 inches.
Use measuring tape and multiply feet by 12.
19.5 inches
Five feet six inches !
Type is what? Standard is six feet and seven inches. This varies according to body type
66 inches
15 feet 7 inches.
66 inches is 5.5 feet (5 feet 6 inches).
five feet six inches.
Slightly over six feet six inches.
72 inches
Six square feet Six square feet
50 inches or 4 feet 2 inches.