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What is the perimeter of square circumscribed about a circle of radius of 4r?

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What is the perimeter of square circumscribed about a circle of radius of 4r?
posted Oct 26, 2016 by Amarvansh

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2 Answers

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Answer = 22.64r

enter image description here

answer Oct 26, 2016 by George Davros
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If 4r is the radius, then one side of a square is squareroot of (2 (4r)^2).......from Pythagoras theorem

i.e one side of a square is 4r (squareroot of 2)

And perimeter is 4 × one side........

Therefore, the perimeter is 16r × (squareroot of 2)

answer Oct 27, 2016 by Justine Mtafungwa



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