The rectangle, which is 10 cm long and 4 cm wide, was cut into a square and a rectangle. Find the perimeters of these figures.

Since the initial width of the rectangle is 4 cm, all sides of the square should be 4 cm.

In this case, the new length of the rectangle will be:

10 – 4 = 6 cm.

Find the perimeter of the rectangle.

To do this, multiply the sum of the sides of the rectangle by 2.

2 * (4 + 6) = 2 * 10 = 20 cm.

Find the perimeter of the square.

To do this, multiply the side length of the square by the number.

4 * 4 = 16 cm.

Answer: The perimeter of the rectangle is 20 cm, the perimeter of the square is 16 cm.