10 feet? amateur lang un AFAIK., pero ang alam ko sa PBA and FIBA is 12 FEET.
"Each basket ring shall be securely attached to the backboard with its upper edge 10’ above and parallel to the floor and equidistant from the vertical edges of the board.The nearest point of the inside edge of the ring shall be 6” from the plane of the face of the board. The ring shall be painted orange."

NBA yan. generally, its the same.. sobra naman discrepancy ng 2 feet for amateur and pro.