Related Clues:

• Protractor measurements
• Lines from the center
• Pie chart dividers
• Pie cuts, essentially
• Spokes, essentially
• Projections from a central point
• They meet in the middle
• Corner measurements
• Pizza slice borders, e.g.
• Minute hands, say
• Camera positions
• Square quartet
• Half-diameters
• Neighbors of ulnae
• Hub-to-rim lines