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Bow Tie
Age 11 to 14
Challenge Level 
You may find it helpful to cut out some accurately drawn tiles and
experiment fitting them together or to cut out one tile to use as a
template and to draw the tiling by drawing the outline of your
template over and over again.
It may help to use the relationships: 2A+D=360 ° and 2C+D=360 °.
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