1.What two words have thousands of letters in them?

1.What two words have thousands of letters in them?
Answer:( )
2.What word begins with“e”,ends with“e”,ang has one letter?
Answer:( )
3.The followingΔ,Θ,Ο each stands for(代表) a number.What does each stand for?
Δ+Δ+Δ=Ο+Ο
Ο+Ο+Ο+Ο=Θ+Θ+Θ
Δ+Θ+Ο+Ο=180
Answer:Δ=( );Θ=( );Ο=( );