The area of a rectangle with sides of 25cm and 4cm is equal to the area of the square, find the side of the square.

1) Let’s find out what area a given rectangle has if it is known that its length is 25 cm and its width is 4 cm.

25 * 4 = 100 cm².

2) Find out how long the side of the square is, if it is known that its area is equal to the area of a rectangle with sides of 25 cm and 4 cm, and the area of the rectangle is 100 cm².

100 = 10 * 10

10 cm.

Answer: the side of a square with an area of 100 cm² was 10 cm.