Which part of the hip bone articulates with the femur, and with the sacrum?

Explanation

To answer the question about which part of the hip bone articulates with the femur and with the sacrum, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Identify the Hip Bone Structure**: The hip bone, also known as the pelvic bone, consists of three main parts: the ilium, ischium, and pubis.

2. **Articulation with the Femur**: The part of the hip bone that articulates with the femur is the **acetabulum**. The acetabulum is a cup-shaped socket located on the lateral aspect of the hip bone, where the head of the femur fits in, forming a ball-and-socket joint.

...