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Another window has a design which is shown below. The whole window is a square; the
central section is made of plain glass; the outer section is coloured. The curved lines are
arcs of circles of the same radius as the side length of the square and centred on its
corners. What is the ratio of coloured to plain glass in the whole window? Give your
answer in the form 1 : ?, where ? is a decimal correct to 3 sf.
central section is made of plain glass; the outer section is coloured. The curved lines are
arcs of circles of the same radius as the side length of the square and centred on its
corners. What is the ratio of coloured to plain glass in the whole window? Give your
answer in the form 1 : ?, where ? is a decimal correct to 3 sf.