Perimeter of an equilateral triangle 24cm find the perimeter of a square whose length is 3cm longer than the length of the triangle.

1) Since the triangle is equilateral, its sides are equal.
2) The perimeter of a triangle is the sum of the lengths of all its sides:
P = a + a + a = 3a.
3) Knowing the perimeter of an equilateral triangle, we calculate the length of each side:
a = P: 3 = 24: 3 = 8 cm.
4) Calculate the side length of the square if it is 3 cm longer than the side length of the given triangle:
8 + 3 = 11 cm.
5) The perimeter of a square is equal to the sum of the lengths of all its four sides:
11 + 11 + 11 + 11 = 44 cm.
Answer: the perimeter of the square is 44 cm.