It"s relatively easy to watch the separation, personal, instance 1 x 1 squares and also count them. Same with the 4 x 4 square, as it"s the perimeter of the totality array. Through the 2 x 2 squares, begin with a 2 x 2 square in, say, the upper left corner and also "move" the square one room to the right. Then one more to "complete" the height row. Then move it one square "down" and continue until arriving at the location you started. There will certainly be 9 various "positions" because that the 2 x 2 square.

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∙ 10y ago
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