The outside angle 15 of {HEAD ~ the base} 10 forming a junction with {TAIL ~ the oblique side} 12 remains rounded 
The outside angle 15 of { HEAD ~ the base } 10 forming a junction with { TAIL ~ the oblique side } 12 remains rounded
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH