Question

A long, narrow sacrum with triangular pubis; would you expect to find the sub-pubic angle larger or smaller than 90 degrees. male or female?

Answer 1

A long, narrow sacrum with triangular pubis suggests the presence of a male pelvis, which would have a subpubic angle smaller than 90 degrees.

Step-by-step explanation:

A long, narrow sacrum with triangular pubis is characteristic of the male pelvis. In comparison to females, the subpubic angle of a male is typically less than 70 degrees, which is smaller than the female subpubic angle that is greater than 80 degrees. Given that the question mentions a narrow sacrum with a triangular pubis, these features suggest that the subpubic angle would be smaller than 90 degrees, indicative of a male pelvis. Females, who have evolved to facilitate childbirth, have a broader pelvis with a larger subpubic angle, a rounder pelvic brim, and a wider and more shallow lesser pelvic cavity than males.