Special right triangle allows one to quickly calculate various lengths in geometric problems without resorting to more advanced methods. "Angle-based" special right triangles are specified by the relationships of the angles of which the triangle is composed. The angles of these triangles are such that the larger (right) angle, which is 90 degrees or radians, is equal to the sum of the other two angles. The side lengths are generally deduced from the basis of the unit circle or other geometric methods. This approach may be used to rapidly reproduce the values of trigonometric functions for the angles 30°, 45°, and 60°. Special
Right-angle weave also variations on the basic stich like cubic right angle weave, or CRAW. Seed beads, fire polished beads and crystal beads are common choices in pieces using right-angle weave. This stitch is said to have originated somewhere in Africa, but examples can be found in beadwork from many cultures, including Philippines, New Guinea and England. Bead artists are known to use right-angle weave stitch to cover forms, such as vases, beads and other objects. 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,