Related Clues:

• Three-point lines
• Geometric sector boundaries
• Paths of pop-ups
• Rainbow-like shapes
• Tennis lobs, e.g.
• Story progressions
• C shapes
• Tossed-ball trajectories
• They may be drawn with compasses
• Geometric curves
• Trajectories, often
• Tire tracks, often
• Curved trajectories
• Ball trajectories
• Circle makers