I. 3/2 2/3 the odd2's outside verts ...return to next below ....or see a h=97 versions on 3a.html II. diff zont lengths, still 3/2 2/3
...next ....or back to previous above, I. III, 2 top z at 1 and 1, 2 bottom z at 2 and 1, v at 3/2 and 3/2 ...back to above, II. ....or back to I. ....further combos of 2/3, 3_1.html 
