aim at the front of the rim or a bit in front of the rim
at the front of the rim you should aim at the backboard behind the hoop, the orange square:)
It's measured from the center of the rim.
When shooting free throws, the distance is measured from the foul line to the base of the backboard. In the case of 3-pointers, the shortest distance is measured...depending on where the ball is shot from. If you shoot from the corner, the distance is measured to the side of the rim. If you shoot from the top of the 3 point arc, the distance is measured to the front of the rim.
When shooting a basketball, look at the rim farthest away from you. This way, if you put a nice spin to the ball, a not-too-high arch, then it will either go straight in or hit the rim and roll back into the basket.
square up, find an open area , focus, and aim for the backboard or the back of the rim
You didn't specify front or back, 21" front and 19" rear are what's on the 02.
No - replace the rim. Go to a salvage yard and take one off a wreck.
on the backboard above the rim
Precisoin is how consistent you are to hitting a target, for instance if you were shooting free throws, and you always hit the front of the rim that would be precise but NOT accurate. And accuracy is both precision and accuracy. So instead of being precise by hitting the front of the rim, you would make the shot by being accurate.
The foul line to the front of the rim us 15 feet.