The superior border forms a wide depression from the medial angle to the coracoid process.

Its posterior border is concave and forms the anterior boundary of the mandibular notch.

Hamtrack's western border where it touchs Detroit and then its southern border forms the district line.

The anterior border forms the posterior boundary of the sphenopalatine notch.

Its eastern border also forms the national eastern border with Cameroon.

Sometimes provincial borders form cultural or geographical boundaries.

Its borders form an irregular polygon that resembles a truncated triangle pointing west.

These three borders form three surfaces; the medial, lateral and posterior.

The city's borders form a rectangle, nearly a square.

The Anglin flows northwest through the middle of the commune, then forms its northwestern border.