Squared up
Geometry
Level
1
A square (the geometric figure) is divided into 9 identical smaller squares, like a tic-tac-toe board. If the original square has a side length of 3 (and thus the 9 small squares all have a side length of 1), and you remove the central small square, what is the area of the remaining figure?
The answer is 8.
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1 solution
The original 3 by 3 square has an area of 9. If we remove a 1 by 1 square with are 1 from the center, the remaining area is 9-1 = 8