It is: 60/4 = 15 and 152 = 225 square inches
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A square has four equal sides. If its perimeter is 60 inches, then each side is 15 inches. A 15x15 square has an area of 15x15 = 225 square inches.
Area of equilateral triangle: 0.5*8*8*sin(60 degrees) = 27.7 square inches rounded
Area of equilateral triangle: 0.5*7*7*sin(60 degrees) = 21.2 square inches
A = 2,827 square inches.
Well, honey, if a square has an area of 60 square inches, then the side length would be the square root of 60, which is approximately 7.75 inches. So, grab your ruler and measure away!