vertex v1 -1 0 0
vertex v2 9 0 0
vertex v3 1 1 0
vertex v4 1 1 5
polyvertex w1 v1 v3 v2 v1
mkplane s1 w1
polyvertex w2 v1 v2 v4 v1
mkplane s2 w2
polyvertex w3 v2 v3 v4 v2
mkplane s3 w3
polyvertex w4 v1 v4 v3 v1
mkplane s4 w4
sewing s s1 s2 s3 s4
fixshape  r  s  -maxtaila 10  -maxtailw 0.7

checknbshapes  r  -vertex 5  -edge 7  -wire 4  -face 4  -shell 1  -solid 0  -compsolid 0  -compound 0
checkprops r -l 69.237606465667483