Own goal point". As a legitimate defensive play, an Australian rules football defender may concede an "own score". Such a score, referred to as a "rushed behind" and statistically credited to no player (score sheets simply include the tally of rushed behinds), results in the opposition team scoring one point. A defending player may choose to concede a rushed behind when the risk of the opposition scoring a goal (worth six points) is high. It is impossible for a team to concede an own goal worth six points. Own goal An own goal is an event in competitive goal-scoring sports (such as
Five points determine a conic Five points determine a conic In Euclidean and projective geometry, just as two (distinct) points determine a line (a degree-1 plane curve), five points determine a conic (a degree-2 plane curve). There are additional subtleties for conics that do not exist for lines, and thus the statement and its proof for conics are both more technical than for lines. Formally, given any five points in the plane in general linear position, meaning no three collinear, there is a unique conic passing through them, which will be non-degenerate; this is true over both the Euclidean plane and any pappian projective plane.