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
Right-angle weave Right-angle weave Right-Angle weave stitch, also known as RAW, is an off-loom bead weaving technique. Beads are stitched together with thread only making right angle turns, hence the name. The result is an almost fabric like piece of beadwork. Right-Angle weave can be woven with either one needle or two. With single needle right-angle weave, the thread path moves in a figure-eight pattern. For double needle right-angle weave, the threads cross each other along the center bead of each stitch as they head in opposite directions. RAW can be formed into flat pieces, tubes, or 3 dimensional figures. There are