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Image Credit
/-/https/www.sciencebuddies.org/cdn/Files/14547/5/perimeter-magic-triangle-explained-with-blocks.jpg)
Description:
Set of pictures illustrating how the total number of pennies used to build the three towers on each side of the triangle must be the same
Source:
Sabine De Brabandere, Science Buddies
License:
Science Buddies
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