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'Bryony's Triangle' printed from http://nrich.maths.org/

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Watch the video below in which Bryony demonstrates how to make a flower from a square of paper. (If you can't see the control bar, zoom out in your browser.)
She then sets you a challenge: what fraction of the original square of paper is the shaded triangle?



 
We would love to hear how you approach this problem.
You may want to send us in pictures or photos along with your explanations.

Thank you to Bryony Black for giving us permission to use this problem.