Symbols in some area formulas

• TV's Magnum and Rockford, for two
• Pastries?
• Some tails, for short
• Parts of geometry calculations
• Letters used by geometers
• Gumshoes: Abbr
• Letters on some college buildings
• Omicron's followers
• Greek consonants used in circle formulas

Wiktionary Word definitions in Wiktionary
n. (plural of pi English)