Related Clues:
- Straight edges of pizza slices, essentially
- Elbow bones
- Geometry-class measurements
- They're parallel to 105-Down
- They're parallel to 28-Across
- Two make the diameter
- Ulnas' neighbors
- Geometry measures
- Diameters halved
- Bones near the elbow
- They meet at the center
- Bony neighbors of radii
- Certain long bones
- Bones also called cubiti
- They turn on hinges