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'Weekly Problem 27 - 2009' printed from http://nrich.maths.org/

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triangle
The perimeter of a large triangle is 24 cm. What is the total length of the black lines used to draw the figure?

 

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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