bryant's triangle bryant's triangle a surface marking of clinical importance is bryant's triangle (or iliofemoral triangle), which is mapped out thus: the hypotenuse of the right angled triangle is a line from the anterior superior iliac spine to the top of the greater trochanter. its sides are formed respectively by: a vertical line from the anterior superior iliac spine a perpendicular line from the top of the greater trochanter. bryant's trianglenélaton's line and bryant's triangle.anatomical terminology