Possible Clues:

• Greek reminder about bathing beach being shortened
• 8's signal up top
• You heard about top Greek mathematician
• Geometry pioneer
• Greek mathematician, d. mid-3rd century BC
• Noted figure in Raphael's 'The School of Athens'
• University College may be accepted by reformed idle mathematician
• Suggestion backed top mathematician
• Greek mathematician, founder of geometry
• Community police department arrest lecturer, famous among students of mathematics