Final answer:
The sex of the skeleton is likely female based on the triangular-shaped pubis, which indicates a broader angle between the pubic bones characteristic of a female pelvis.
Step-by-step explanation:
To determine the sex of a skeleton based on the characteristics provided, certain pelvic features are typically analyzed. The features such as circular eye orbits, a jaw angle of 105 degrees, and a triangular-shaped pubis may indicate various aspects of the skeletal structure, but the most reliable indicator among those listed for determining sex is the shape of the pubis.
To the information provided, the shape of the pubic bone can be a distinct factor in differentiating between a male and a female pelvis. The female pelvis is described as having a broader angle between the pubic bones to adapt to reproductive fitness. Given that the query references a triangular-shaped pubis, it can be presumed that this is an indicator of a wider, broader angle, which is characteristic of a female pelvis. Therefore, the sex of the skeleton is likely female.