The square whose perimeter is 24 dm was divided into 2 equal rectangles, find the area of each rectangle.

Let’s solve this task in steps and explain each of them in detail.
1) 24: 4 = 6 decimetres – side of a square, since its perimeter is 24 decimeters, and all 4 sides of it are equal to each other;
2) 6 * 6 = 36 dm ^ 2 – the area of a square with a side of 6 decimeters;
3) 36: 2 = 18 dm ^ 2 – the area of two equal rectangles, since a square with an area of 36 dm ^ 2 was divided into 2 equal rectangles.
Answer: 18 dm ^ 2.