Author Question: A hemispherical structure that can be understood as an arch rotated 180 degrees on its axis is a(n) ... (Read 89 times)

biggirl4568

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A hemispherical structure that can be understood as an arch rotated 180 degrees on its axis is a(n) ____________.
 
  what is it please?

Question 2

____________ is a wooden support structure upon which arches and vaults are constructed.
 
  help needed on this one


Qarqy

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Answer to Question 1

Answer: dome

Answer to Question 2

Answer: Centering



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