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'Weekly Problem 38 - 2013' printed from

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regular hexagon divided into 6 equilateral triangles
The diagram shows a regular hexagon divided up into six equilateral triangles.

How many quadrilaterals are there in the diagram?


If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.  

This problem is taken from the UKMT Mathematical Challenges.

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