Inscribed angle its intersection points equals half of the central angle subtended by the chord. See also Tangent lines to circles. The inscribed angle theorem is used in many proofs of elementary Euclidean geometry of the plane. A special case of the theorem is Thales' theorem, which states that the angle subtended by a diameter is always 90°, i.e., a right angle. As a consequence of the theorem, opposite angles of cyclic quadrilaterals sum to 180°; conversely, any quadrilateral for which this is true can be inscribed in a circle. As another example, the inscribed angle theorem is the basis for several
How Are You At The Factory" as though it was the second single. It reached #16 on Billboard's Album Rock Tracks chart. On his review of "Think Visual", David Wild of "Rolling Stone" wrote, "the melancholy "How Are You" is another of Ray's well-crafted songs of love and loss." The track also appeared on the compilation album, "Picture Book". Like many other Kinks singles of the 1980s, a promotional video for "How Are You" was filmed, featuring Ray Davies. Unusually, the video "How Are You" (as well as those for the two other singles from "Think Visual") was not directed by Julien Temple,