The perimeter of an isosceles triangle is 30cm. its base is 12cm. the side of the square is 2cm

The perimeter of an isosceles triangle is 30cm. its base is 12cm. the side of the square is 2cm shorter than the side of the triangle. find the perimeter of the square.

The perimeter is the sum of all sides of the shape.
To find the side of a triangle, you need to subtract the base (12 cm) from its perimeter (30 cm) and divide by the number 2 (since in an isosceles triangle the sides are equal).
We get: (30 – 12): 2 = 18: 2 = 9 cm – the side of the triangle.
The problem says that the side of the square is 2 cm shorter than the side of the triangle.
We get: 9 – 2 = 7 cm – the side of the square.
To find the perimeter of this square, add all its sides (all four sides of the square are equal).
We get: 7 + 7 + 7 + 7 = 28 cm.
Answer: 28 cm.