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'Bryony's Triangle' printed from

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Watch the video BryonyTriangle.mp4 in which Bryony demonstrates how to make a flower from a square of paper.
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.