Angle trisection with coefficients in the field generated by these numbers. Therefore, any number that is constructible by a sequence of steps is a root of a minimal polynomial whose degree is a power of two. Note also that radians (60 degrees, written 60°) is constructible. The argument below shows that it is impossible to construct a 20° angle. This implies that a 60° angle cannot be trisected, and thus that an arbitrary angle cannot be trisected. Denote the set of rational numbers by . If 60° could be trisected, the degree of a minimal polynomial of over would be a power
Triangle-and-two defense Triangle-and-two defense The triangle-and-two defense is a particular type of defense used in basketball. The triangle-and-two defense is a hybrid between a man-to-man defense in which each defensive player is responsible for marking a player on the other team, and a zone defense in which each defensive player is responsible for guarding an area of the court. In a triangle-and-two defense, three players play zone defense, and align themselves in a triangle protecting the basket, with typically the power forward and center playing directly under the basket, and the small forward playing towards the foul line. The shooting guard and