4 * 5x = 20x
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Each side of the square is 2x+1.5 and its area is (2x+1.5) squared
The perimeter of a square is four times the length of its side.
Suppose the side of the triangle is x metres.Then side of square is x + 10 metresso that the perimeter of the square is 4*(x+10) metresPerimeter of the triangle is 3*x metresSo 4*(x+10) = 3*(3*x) metresie 4x + 40 = 9x or 40 = 5x ie x = 8 metres
Each side of the square is a quarter of the square's perimeter.
Perimeter of a square = 4*side = 4*3 cm = 12 cm.