In a cross sectional view they will now form {HEAD ~ a slimm triangle} with the outer diameter as its apex and {TAIL ~ the central cylinder wall} as its base 
with
In a cross sectional view they will now form { HEAD ~ a slimm triangle } with the outer diameter as its apex and { TAIL ~ the central cylinder wall } as its base
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH