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  • Early Years Foundation Stage

Bow Tie

Age 11 to 14
Challenge Level Yellow starYellow star
  • Problem
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Show how this pentagonal tile can be used to tile the plane and describe the transformations which map this pentagon to its images in the tiling. The lengths AE and ED are 1 unit and the length CD is 2 units. The angles B and E are right angles and the angles A, C and D are 120 °.


Here is a printable copy for you to download, print and try yourself.


Here is an interactive that may help you.
Click on the grey shapes to create new tiles. You can rotate the pieces using the corner points.
Printable NRICH Roadshow resource.


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Can you work out the area of the inner square and give an explanation of how you did it?

Square Pegs

Which is a better fit, a square peg in a round hole or a round peg in a square hole?

Not So Little X

Two circles are enclosed by a rectangle 12 units by x units. The distance between the centres of the two circles is x/3 units. How big is x?

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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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