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Equilateral Triangle

Directions: Using the digits 1 to 9, at most one time each, fill in the boxes to fill in the circles of the triangle. The sum of the numbers on each side of the triangle is equal to the length of that side. Arrange the numbers so that the triangle is an equilateral triangle.



What are the criteria for an equilateral triangle?



There are many possible answers. See one possible answer below.

Source: Erick Lee

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