To find the side, take the square root of 441. Since 21 × 21 = 441, the side length of the square is 21 meters. So, the side is 21 m.
Class 8 NCERT Ganita Prakash Chapter 1 A Square and A Cube solutions
Class 8 Mathematics Textbook Chapter 1 A Square and A Cube question answer
If the area of a square is 441 m², then the side is the square root of 441. Since 21 × 21 = 441, √441 = 21. So, the side of the square is 21 meters long. This follows the formula:
Area = side × side → side = √Area
This method helps in reverse-calculating side lengths from square areas.
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