In the square, sides n and k are perpendicular to side j as they form right angles at the vertices. Side m is parallel to j, not perpendicular.
In the given square, sides n and k are perpendicular to side j. The perpendicularity arises due to the inherent properties of a square, where opposite sides are parallel and adjacent sides are perpendicular. Specifically, n and k are adjacent to j, forming right angles at the vertices.
Meanwhile, m is parallel to j and, by definition, not perpendicular. Understanding the geometric relationships within a square is crucial for accurately identifying perpendicular sides, facilitating a comprehensive comprehension of the inherent properties and symmetries of this fundamental geometric shape.