Directions: Using the digits 1 to 9 at most two times each, place a digit in each box to make a circle with the least possible area. Source: Robert Kaplinsky
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Equation of a Circle 1
Directions: Using the digits 1 to 9 at most two times each, place a digit in each box to make two circles: one with an area of less than 10 units2 and one with more than 10 units2. Source: Robert Kaplinsky
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