To further educate: it was known as the key because the circle around the foul line was 12' in diameter, thus creating a "keyhole" shape. It was widened (in 1951) because of the dominance of tall centers. Some even experimented with avoiding 3" by straddling the lane! It was widened to 12' and then later (in the NBA) to 18'.joe amos yaks said:
A "three second area" created in 1936 was to prevent offensive players from "camping out" around the basket -- which they did -- and to eliminate some rough play and smash-mouth aspects of the game -- good grief! The three second area was 6 feet wide. It was known as the "key". In 1951 the CBB three second area was widened to 12 feet. It never was 8 feet. How about that?
Also, why are CBB players sometimes referred to as "cagers"?
Answer: Before 1932 chicken wire (or chain-link) fencing was often installed around the court in an effort to make the game go faster by eliminating all the out of bounds delays, and it served as a buffer to protect players from rowdy spectators -- and vice versa -- and from objects being hurled onto the court -- which there often was.
When games got physical the wire fences were used by players to body check each other like in hockey -- and they did -- often resulting in injury. So in ca.1933 "cage" fences were removed; however, some more seasoned ("experienced") sportswriters still use the term "cagers" in reference to CBB play. That's just the way it is.
Some early rules (Joe, HTP, and SFCity probably remember...):
initially dribbling needed to be with 2 hands and limited to 1 bounce
initially dribbler couldn't shoot, only someone who caught a pas
center jump after every made basket (until the 30's)
losing the ball out of bounds was a foul