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https://vle.mathswatch.co.uk/images/questions/question15742.png

 Nov 7, 2017
 #1
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Each circle has a radius of 5mm

 

And we have  4 quarter-circles with this radius......so this partial perimeter is

 

4 (1/4) 2 * pi * 5  =  10 pi

 

And the distance between each radius is 10 mm

 

And this distance appears 4 times  =  40mm

 

So....the total perimeter is   [ 10 pi + 40 ] mm  

 

 

cool cool cool

 Nov 7, 2017

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