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make three squares and overlap them so that two of them meet in the center of the third square, making four smaller squares in the center
ignominious
You can use plumb lines to find its center of gravity. Hold it from one point and draw vertical line in direction of gravity (plumb line). Hold it from another point and do the same, and a third point if necessary; where the lines cross is center of gravity
r square-12r+12=0
the difference between the third and over the third or under the third line is that they are difference