{HEAD ~ Each side} creates an angle between about 50° and about 70° from {TAIL ~ the base} to a side 
{ HEAD ~ Each side } creates an angle between about 50 ° and about 70 ° from { TAIL ~ the base } to a side
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH