Final answer:
A male pelvis can be identified by its subpubic angle of less than 70 degrees and a heart-shaped pelvic inlet, unlike the female pelvis which has a broader subpubic angle and a round or oval-shaped pelvic inlet.
Step-by-step explanation:
Two ways to tell if a pelvis is male include examining the subpubic angle and the shape of the pelvic inlet. The male pelvis has a subpubic angle of less than 70 degrees, which is narrower than the female's, which is greater than 80 degrees. Additionally, the male's pelvic inlet is heart-shaped, contrasting with the more rounded or oval shape of the female's pelvic inlet due to the adaptation for childbirth. Another distinguishing feature is the sciatic notch, which is narrower and deeper in the male pelvis, while it is broader in females.