Related Clues:

• Mostly communicate with one — none is any longer in specific circle
• Lines in circles
• Tar easily covers such spaces
• Lines from a circle’s centre to its perimeter
• Head cut from nail with two straight lines
• Awesome, two straight lines
• Some geometry exam answers
• Protractors measure them
• Some geometry products
• Pool shot considerations
• "I teach geometry, so I know all the __": math professor's quip
• Gray ___ (ambiguous situations)
• Location, location, location