Thus, in {HEAD ~ a right triangular assembly} of {TAIL ~ three connector elements}, in which two rod elements of length Lx form sides, a rod element of the next larger size forms a hypotenuse 
of
Thus , in { HEAD ~ a right triangular assembly } of { TAIL ~ three connector elements } , in which two rod elements of length Lx form sides , a rod element of the next larger size forms a hypotenuse
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH