Pentagon

What are the names of different types of pentagons?
What is a 20 sided pentagon called? Regular Twenty gon The regular icosagon has Schläfli symbol {20}, and can also be constructed as a truncated decag...
Did a plane crash into the Pentagon?
What time did the third plane crash into the Pentagon? A third flight, American Airlines Flight 77, flown from Dulles International Airport, was hijac...