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
Yod (astrology) Yod (astrology) Yod is an astrological aspect pattern that involves any three planets or points in the horoscope that form an isosceles triangle. This phenomenon occurs when two planets are sextile (60° aspect) to each other, and both are then quincunx (150° aspect) to a third. The Yod is formed when the two planets make a sextile aspect and the third planet is opposite their mid-point. That third planet must make angles of 150 degrees with the other two. If you drew lines on the chart connecting the planets, you would get a Y-shaped formation that seems to point to