Maths

Hi im doing measurement at skool at the moment and i cant quite ork out some questions. Can someone please help!!!!

A circular portrait photograph has a diameter 18cm and is to be placed in a 20cm square frame. Determine the ratio of the area of the photograph to the area of the frame.

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asked by Hannah
  1. (portrait area)/(frame area)
    =[(1/4)*pi*18^2]/[20^2]
    = (pi/4)*(0.81) = ?

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    posted by drwls

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