no
There are 15 ft from the free throw line to the backboard.
The free throw line is always 15 ft from the line to the backboard. Or 19 feet from the free throw line to the baseline.
hit off backboard
19 feet from the baseline 15 feet from the backboard.
....it starts on the floor
15 ft or about 4.6 m
23 feet 9 inches on the top side and 22 feet in the corners
The free throw line is always 15 ft from the line to the backboard
Answer 15 feet. The center of the goal is 13 feet 9 inches from the back of the free throw line. From the center of the goal to the backboard it is 1 foot 3 inches. 13' 9" + 1' 3" = 15 ' Typical placement of the backboard is to have its back 15 feet from the back of the free throw line, and inside the base line by 4 feet. This is why the arc falls off at 5 feet 3 inches ( 63") from the base line. ( The beginning of the corners )
19 feet from the baseline 15 feet from the backboard.
It is not illegal to throw it off the backboard, provided that the ball hits the rim at some point. Any time a player does not hit the rim during a free throw attempt (whether it is inadvertent or not) he forfeits his free throw attempt, even if he has one or more free throws forthcoming.
The distance of the free throw line is 15 feet (or 4.572m) from the backboard. The rim is 45cm in diameter, plus the 15 cm that divide the rim from the backboard, making the front of the rim 3.972m (or 13.03 feet) from the foul line.