Historical clue formulations

• Two of them make up a diameter — 2026-09-13
• They're found in a circle — 2026-05-06
• Sides of pie slices, essentially — 2025-12-25
• Diameters halved — 2025-09-29
• They're all equal in a circle — 2025-08-02
• Pie chart dividers — 2025-06-15
• Diameter halves — 2024-07-15
• Arm bones — 2024-01-31
• Half-diameters — 2023-01-30
• Bicycle spokes, e.g. — 2022-09-01
• Minute hands, essentially — 2022-03-30
• Bones next to ulnae — 2022-02-28
• Straight sides of sectors — 2021-09-19
• Spokes, say — 2021-04-28
• Half-diameters — 2020-07-27
• Sides of Pac-Man's mouth, essentially — 2020-04-24
• Windmill blades, essentially — 2018-11-16
• Ulnae neighbors — 2018-02-07
• Pie chart features — 2017-04-20
• Pie chart lines — 2017-02-08
• Circle lines — 2016-09-07
• Sides of sectors — 2016-03-06
• Half-diameters — 2015-06-08
• Minute hands, in a way — 2014-10-25
• Many lines on pie charts — 2014-08-26
• The two sides of Pac-Man's mouth, say — 2014-06-01
• Cuts into a pizza, often — 2014-02-28
• They come from the center — 2013-11-17
• Pizza cuts, essentially — 2013-11-13
• Arm bones — 2013-05-12
• Forearm bones — 2013-01-24
• Lines going out in all directions — 2012-08-14
• Spokes — 2012-08-08
• Circle measures — 2010-10-20
• Straight edges of pizza slices, essentially — 2009-11-04
• They start in the middle — 2008-12-18
• r's, in math — 2008-11-30
• Cuts into a pie, often — 2008-03-01
• Spokes, essentially — 2007-10-10
• Hub-to-rim lines — 2007-09-09
• Forearm bones — 2006-12-05
• They meet in the middle — 2006-09-10
• Projections from a central point — 2006-08-31
• Pie chart dividers — 2006-02-25
• They have a central meeting place — 2005-11-25
• State-named avenues in Washington, essentially — 2005-10-05
• Pie chart lines — 2004-09-28
• Arm bones — 2004-08-17
• Hub projections — 2004-07-05
• Spokes, e.g. — 2004-05-18