Answer:
Dimensions of the square garden = 9 meters by 9 meters
Dimensions of the triangular garden = 12 meters
Explanation:
Let the measure of a side of the square garden = x meters
Perimeter of the square = 4x meters
Since each side of the triangle is 3 meters longer than each side of the square, side of the triangle will measure = (x + 3)
Perimeter of the equilateral triangle = 3(x + 3) meters
Perimeter of the square = perimeter of equilateral triangle
4x = 3(x + 3)
4x = 3x + 9
4x - 3x = 9
x = 9 meters
Dimensions of the square garden = 9 meters by 9 meters
Dimensions of the triangular garden = 12 meters