Special right triangle is 90°, leaving the remaining angle to be 30°. Right triangles whose sides are of integer lengths, with the sides collectively known as Pythagorean triples, possess angles that cannot all be rational numbers of degrees. (This follows from Niven's theorem.) They are most useful in that they may be easily remembered and any multiple of the sides produces the same relationship. Using Euclid's formula for generating Pythagorean triples, the sides must be in the ratio where "m" and "n" are any positive integers such that . There are several Pythagorean triples which are well-known, including those with sides in the
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,